Prism::DSL#string_flag

# File tmp/rubies/ruby-3.4.1/lib/prism/dsl.rb, line 952
def string_flag(name)
  case name
  when :forced_utf8_encoding then StringFlags::FORCED_UTF8_ENCODING
  when :forced_binary_encoding then StringFlags::FORCED_BINARY_ENCODING
  when :frozen then StringFlags::FROZEN
  when :mutable then StringFlags::MUTABLE
  else Kernel.raise ArgumentError, "invalid StringFlags flag: #{name.inspect}"
  end
end