process_hash

# File activesupport/lib/active_support/core_ext/hash/conversions.rb, line 186
      def process_hash(value)
        if value.include?("type") && !value["type"].is_a?(Hash) && @disallowed_types.include?(value["type"])
          raise DisallowedType, value["type"]
        end

        if become_array?(value)
          _, entries = Array.wrap(value.detect { |k, v| not v.is_a?(String) })
          if entries.nil? || value["__content__"].try(:empty?)
            []
          else
            case entries
            when Array
              entries.collect { |v| deep_to_h(v) }
            when Hash
              [deep_to_h(entries)]
            else
              raise "can't typecast #{entries.inspect}"
            end
          end
        elsif become_content?(value)
          process_content(value)

        elsif become_empty_string?(value)
          ""
        elsif become_hash?(value)
          xml_value = value.transform_values { |v| deep_to_h(v) }

          # Turn { files: { file: #<StringIO> } } into { files: #<StringIO> } so it is compatible with
          # how multipart uploaded files from HTML appear
          xml_value["file"].is_a?(StringIO) ? xml_value["file"] : xml_value
        end
      end