syn String MInnerMappingDefinition.toType() = mappingDef().getToType().prettyPrint();
syn String MInnerMappingDefinition.methodName() = getMMappingDefinition().methodName();
syn MappingDefinition MInnerMappingDefinition.mappingDef() = getMMappingDefinition().getMappingDefinition();
syn String MInnerMappingDefinition.outputVarName() = "result" + methodName(); // we do not need "_" in between here, because methodName begins with one