           @root_converter
           @variable_converter
           @fraction_converter
+          @fn_converter
           ]
 
       process: (js_object)->

          numerator: numerator
          denominator: denominator
        )

    class_mixer _FromFractionObject

    class _FromStringLiteralObject
      initialize: (@converter, @literal_mappings)->

          @processor,
          @component_builder)

        @fn_converter = _FromFnObject.build(
          @processor,
          @component_builder
        )


        @string_literal_converter = _FromStringLiteralObject.build(@component_builder,{
          "+": "build_addition"
          "-": "build_subtraction"
