method

def_singleton_delegators

def_singleton_delegators(accessor, *methods)
public

Shortcut for defining multiple delegator methods, but with no provision for using a different name. The following two code samples have the same effect:

single_forwardable.def_delegators :@records, :size, :<<, :map

single_forwardable.def_delegator :@records, :size
single_forwardable.def_delegator :@records, :<<
single_forwardable.def_delegator :@records, :map

See the example at forwardable.rb.