linter/src/main/java/org/apache/royale/linter/config/ConfigurationBuffer.java [817:871]:
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    private void setPrerequisites(String[] prerequisites, String var, Set<String> done, Object config, boolean required)
            throws ConfigurationException
    {
        if (prerequisites != null)
        {
            for (int p = 0; p < prerequisites.length; ++p)
            {
                String depvar = prerequisites[p];

                // Dependencies can only go downward.
                int dot = var.lastIndexOf('.');

                if (dot >= 0)
                {
                    String car = var.substring(0, dot);
                    //String cdr = var.substring( dot + 1 );

                    String newDepvar = car + "." + depvar;

                    // Since in royale we have collapsed sub-configurations into one
                    // configuration, some options that were in sub-configurations now
                    // have prerequisites on options in the same configuration. We
                    // need to keep the old configuration mappings so old configurations
                    // options will still work. So a simple thing we can do is if the 
                    // dependency variable is invalid (presumably because the 
                    // dependency is really on a parent configuration option), 
                    // then use the dependency as is depvar) and see if it is 
                    // valid. If depvar ends up not being valid then set depvar
                    // to newDepvar so error reporting isn't changed by the new
                    // fall-back behavior.
                    if (isValidVar(newDepvar) || !isValidVar(depvar))
                        depvar = newDepvar;

                }

                if (!done.contains(depvar))
                {
                    if (!isValidVar(depvar))
                    {
                        assert false : ("invalid " + var + " dependency " + depvar);
                        continue;
                    }
                    if (varMap.containsKey(depvar))
                    {
                        commitVariable(config, depvar, done);
                    }
                    else if (required && !committed.contains(depvar))
                    {
                        // TODO - can we get source/line for this?
                        throw new ConfigurationException.MissingRequirement(depvar, var, null, -1);
                    }
                }
            }
        }
    }
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compiler-common/src/main/java/org/apache/royale/compiler/config/ConfigurationBuffer.java [817:871]:
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    private void setPrerequisites(String[] prerequisites, String var, Set<String> done, Object config, boolean required)
            throws ConfigurationException
    {
        if (prerequisites != null)
        {
            for (int p = 0; p < prerequisites.length; ++p)
            {
                String depvar = prerequisites[p];

                // Dependencies can only go downward.
                int dot = var.lastIndexOf('.');

                if (dot >= 0)
                {
                    String car = var.substring(0, dot);
                    //String cdr = var.substring( dot + 1 );

                    String newDepvar = car + "." + depvar;

                    // Since in royale we have collapsed sub-configurations into one
                    // configuration, some options that were in sub-configurations now
                    // have prerequisites on options in the same configuration. We
                    // need to keep the old configuration mappings so old configurations
                    // options will still work. So a simple thing we can do is if the 
                    // dependency variable is invalid (presumably because the 
                    // dependency is really on a parent configuration option), 
                    // then use the dependency as is depvar) and see if it is 
                    // valid. If depvar ends up not being valid then set depvar
                    // to newDepvar so error reporting isn't changed by the new
                    // fall-back behavior.
                    if (isValidVar(newDepvar) || !isValidVar(depvar))
                        depvar = newDepvar;

                }

                if (!done.contains(depvar))
                {
                    if (!isValidVar(depvar))
                    {
                        assert false : ("invalid " + var + " dependency " + depvar);
                        continue;
                    }
                    if (varMap.containsKey(depvar))
                    {
                        commitVariable(config, depvar, done);
                    }
                    else if (required && !committed.contains(depvar))
                    {
                        // TODO - can we get source/line for this?
                        throw new ConfigurationException.MissingRequirement(depvar, var, null, -1);
                    }
                }
            }
        }
    }
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formatter/src/main/java/org/apache/royale/formatter/config/ConfigurationBuffer.java [817:871]:
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    private void setPrerequisites(String[] prerequisites, String var, Set<String> done, Object config, boolean required)
            throws ConfigurationException
    {
        if (prerequisites != null)
        {
            for (int p = 0; p < prerequisites.length; ++p)
            {
                String depvar = prerequisites[p];

                // Dependencies can only go downward.
                int dot = var.lastIndexOf('.');

                if (dot >= 0)
                {
                    String car = var.substring(0, dot);
                    //String cdr = var.substring( dot + 1 );

                    String newDepvar = car + "." + depvar;

                    // Since in royale we have collapsed sub-configurations into one
                    // configuration, some options that were in sub-configurations now
                    // have prerequisites on options in the same configuration. We
                    // need to keep the old configuration mappings so old configurations
                    // options will still work. So a simple thing we can do is if the 
                    // dependency variable is invalid (presumably because the 
                    // dependency is really on a parent configuration option), 
                    // then use the dependency as is depvar) and see if it is 
                    // valid. If depvar ends up not being valid then set depvar
                    // to newDepvar so error reporting isn't changed by the new
                    // fall-back behavior.
                    if (isValidVar(newDepvar) || !isValidVar(depvar))
                        depvar = newDepvar;

                }

                if (!done.contains(depvar))
                {
                    if (!isValidVar(depvar))
                    {
                        assert false : ("invalid " + var + " dependency " + depvar);
                        continue;
                    }
                    if (varMap.containsKey(depvar))
                    {
                        commitVariable(config, depvar, done);
                    }
                    else if (required && !committed.contains(depvar))
                    {
                        // TODO - can we get source/line for this?
                        throw new ConfigurationException.MissingRequirement(depvar, var, null, -1);
                    }
                }
            }
        }
    }
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