@Override
    public void process(boolean validate, boolean documentsOnly) {
        for (SDField field : schema.allConcreteFields()) {
            ScriptExpression script = field.getIndexingScript();
            if (script == null) continue;

            findSummaryTo(schema, field);
            MyConverter converter = new MyConverter(schema, field, validate);
            field.setIndexingScript(schema.getName(), (ScriptExpression)converter.convert(script));
        }
    }
This processor modifies all indexing scripts so that they output to the owning field by default. It also prevents
any output expression from writing to any field except for the owning field. Finally, for <code>SummaryExpression</code>,
this processor expands to write all appropriate summary fields.

@author Simon Thoresen Hult
config-model/src/main/java/com/yahoo/schema/processing/IndexingOutputs.java