# File lib/grape_entity/exposure/nesting_exposure.rb, line 43
        def valid_value_for(key, entity, options)
          new_options = nesting_options_for(options)

          result = nil
          normalized_exposures(entity, new_options).select { |e| e.key == key }.each do |exposure|
            exposure.with_attr_path(entity, new_options) do
              result = exposure.valid_value(entity, new_options)
            end
          end
          result
        end