class ActiveSupport::CodeGenerator::MethodSet

def define_cached_method(canonical_name, as: nil)

def define_cached_method(canonical_name, as: nil)
  canonical_name = canonical_name.to_sym
  as = (as || canonical_name).to_sym
  @methods.fetch(as) do
    unless @cache.method_defined?(canonical_name) || @canonical_methods[canonical_name]
      yield @sources
    end
    @canonical_methods[canonical_name] = true
    @methods[as] = canonical_name
  end
end