class RuboCop::Cop::Lint::DuplicateMethods

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