class RuboCop::Cop::Lint::DuplicateMethods

def found_method(node, method_name)
  if @definitions.key?(method_name)
    loc = node.send_type? ? node.loc.selector : node.loc.keyword
    message = message_for_dup(node, method_name)
    add_offense(node, location: loc, message: message)
  else
    @definitions[method_name] = source_location(node)
  end
end