# File lib/rabl/engine.rb, line 411
      def eval_source(locals, &block)
        # Note: locals and block may be used by the eval'ed source

        return unless @_source.present?

        if @_options[:source_location]
          instance_eval(@_source, @_options[:source_location])
        else
          instance_eval(@_source)
        end
      end