convert_value

# File activesupport/lib/active_support/hash_with_indifferent_access.rb, line 383
      def convert_value(value, conversion: nil)
        if value.is_a? Hash
          if conversion == :to_hash
            value.to_hash
          else
            value.nested_under_indifferent_access
          end
        elsif value.is_a?(Array)
          if conversion != :assignment || value.frozen?
            value = value.dup
          end
          value.map! { |e| convert_value(e, conversion: conversion) }
        else
          value
        end
      end