bundle/core/src/main/java/org/apache/karaf/bundle/command/Headers.java [195:243]:
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        it = packagesAttribs.entrySet().iterator();
        while (it.hasNext()) {
            Map.Entry<String, Object> e = it.next();
            output.append(e.getKey());
            output.append(" = \n");
            formatHeader(ShellUtil.getValueString(e.getValue()), formatters.get(e.getKey()), output, indent);
            output.append("\n");
        }
        if (packagesAttribs.size() > 0) {
            output.append('\n');
        }

        return output.toString();
    }

    protected interface ClauseFormatter {
        void pre(Clause clause, StringBuilder output);
        void post(Clause clause, StringBuilder output);
    }

    protected void formatHeader(String header, ClauseFormatter formatter, StringBuilder builder, int indent) {
        Clause[] clauses = Parser.parseHeader(header);
        formatClauses(clauses, formatter, builder, indent);
    }

    protected void formatClauses(Clause[] clauses, ClauseFormatter formatter, StringBuilder builder, int indent) {
        boolean first = true;
        for (Clause clause : clauses) {
            if (first) {
                first = false;
            } else {
                builder.append(",\n");
            }
            formatClause(clause, formatter, builder, indent);
        }
    }

    protected void formatClause(Clause clause, ClauseFormatter formatter, StringBuilder builder, int indent) {
        builder.append("\t");
        if (formatter != null) {
            formatter.pre(clause, builder);
        }
        formatClause(clause, builder, indent);
        if (formatter != null) {
            formatter.post(clause, builder);
        }
    }

    protected int getTermWidth() {
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subsystem/src/main/java/org/apache/karaf/subsystem/commands/InfoAction.java [187:235]:
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        it = packagesAttribs.entrySet().iterator();
        while (it.hasNext()) {
            Map.Entry<String, Object> e = it.next();
            output.append(e.getKey());
            output.append(" = \n");
            formatHeader(ShellUtil.getValueString(e.getValue()), formatters.get(e.getKey()), output, indent);
            output.append("\n");
        }
        if (packagesAttribs.size() > 0) {
            output.append('\n');
        }

        return output.toString();
    }

    protected interface ClauseFormatter {
        void pre(Clause clause, StringBuilder output);
        void post(Clause clause, StringBuilder output);
    }

    protected void formatHeader(String header, ClauseFormatter formatter, StringBuilder builder, int indent) {
        Clause[] clauses = Parser.parseHeader(header);
        formatClauses(clauses, formatter, builder, indent);
    }

    protected void formatClauses(Clause[] clauses, ClauseFormatter formatter, StringBuilder builder, int indent) {
        boolean first = true;
        for (Clause clause : clauses) {
            if (first) {
                first = false;
            } else {
                builder.append(",\n");
            }
            formatClause(clause, formatter, builder, indent);
        }
    }

    protected void formatClause(Clause clause, ClauseFormatter formatter, StringBuilder builder, int indent) {
        builder.append("\t");
        if (formatter != null) {
            formatter.pre(clause, builder);
        }
        formatClause(clause, builder, indent);
        if (formatter != null) {
            formatter.post(clause, builder);
        }
    }

    protected int getTermWidth() {
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