parse_hash_to_symbols

# File actionview/lib/action_view/render_parser/ripper_render_parser.rb, line 246
        def parse_hash_to_symbols(node)
          hash = parse_hash(node)

          return unless hash

          hash.transform_keys do |key_node|
            key = parse_sym(key_node)

            return unless key

            key
          end
        end