jbpm/jbpm-flow/src/main/java/org/jbpm/workflow/core/node/EndNode.java [56:68]:
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    public void validateAddIncomingConnection(final String type, final Connection connection) {
        super.validateAddIncomingConnection(type, connection);
        if (!Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] only accepts default incoming connection type!");
        }
        if (getFrom() != null && !WORKFLOW_PARAM_MULTIPLE_CONNECTIONS.get(getProcess())) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] cannot have more than one incoming connection!");
        }
    }
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jbpm/jbpm-flow/src/main/java/org/jbpm/workflow/core/node/TimerNode.java [43:55]:
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    public void validateAddIncomingConnection(final String type, final Connection connection) {
        super.validateAddIncomingConnection(type, connection);
        if (!Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] only accepts default incoming connection type!");
        }
        if (getFrom() != null && !WORKFLOW_PARAM_MULTIPLE_CONNECTIONS.get(getProcess())) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] cannot have more than one incoming connection!");
        }
    }
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jbpm/jbpm-flow/src/main/java/org/jbpm/workflow/core/node/ActionNode.java [51:63]:
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    public void validateAddIncomingConnection(final String type, final Connection connection) {
        super.validateAddIncomingConnection(type, connection);
        if (!Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] only accepts default incoming connection type!");
        }
        if (getFrom() != null && !WORKFLOW_PARAM_MULTIPLE_CONNECTIONS.get(getProcess())) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] cannot have more than one incoming connection!");
        }
    }
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jbpm/jbpm-flow/src/main/java/org/jbpm/workflow/core/node/RuleSetNode.java [102:114]:
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    public void validateAddIncomingConnection(final String type, final Connection connection) {
        super.validateAddIncomingConnection(type, connection);
        if (!Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] only accepts default incoming connection type!");
        }
        if (getFrom() != null && !WORKFLOW_PARAM_MULTIPLE_CONNECTIONS.get(getProcess())) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] cannot have more than one incoming connection!");
        }
    }
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jbpm/jbpm-flow/src/main/java/org/jbpm/workflow/core/node/SubProcessNode.java [75:87]:
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    public void validateAddIncomingConnection(final String type, final Connection connection) {
        super.validateAddIncomingConnection(type, connection);
        if (!Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] only accepts default incoming connection type!");
        }
        if (getFrom() != null && !WORKFLOW_PARAM_MULTIPLE_CONNECTIONS.get(getProcess())) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] cannot have more than one incoming connection!");
        }
    }
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jbpm/jbpm-flow/src/main/java/org/jbpm/workflow/core/node/WorkItemNode.java [64:76]:
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    public void validateAddIncomingConnection(final String type, final Connection connection) {
        super.validateAddIncomingConnection(type, connection);
        if (!Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] only accepts default incoming connection type!");
        }
        if (getFrom() != null && !WORKFLOW_PARAM_MULTIPLE_CONNECTIONS.get(getProcess())) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] cannot have more than one incoming connection!");
        }
    }
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jbpm/jbpm-flow/src/main/java/org/jbpm/workflow/core/node/EventNode.java [102:114]:
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    public void validateAddIncomingConnection(final String type, final Connection connection) {
        super.validateAddIncomingConnection(type, connection);
        if (!Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] only accepts default incoming connection type!");
        }
        if (getFrom() != null && !WORKFLOW_PARAM_MULTIPLE_CONNECTIONS.get(getProcess())) {
            throw new IllegalArgumentException(
                    "This type of node [" + connection.getTo().getUniqueId() + ", " + connection.getTo().getName()
                            + "] cannot have more than one incoming connection!");
        }
    }
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