class RuboCop::Cop::Lint::DuplicateMethods

def on_defs(node)
  return if node.ancestors.any?(&:if_type?)
  return if possible_dsl?(node)
  receiver, name, = *node
  if receiver.const_type?
    _, const_name = *receiver
    check_const_receiver(node, name, const_name)
  elsif receiver.self_type?
    check_self_receiver(node, name)
  end
end