class SyntaxTree::CallNode

def format_contents(q)
  call_operator = CallOperatorFormatter.new(operator)
  q.group do
    q.format(receiver)
    # If there are trailing comments on the call operator, then we need to
    # use the trailing form as opposed to the leading form.
    q.format(call_operator) if call_operator.comments.any?
    q.group do
      q.indent do
        if receiver.comments.any? || call_operator.comments.any?
          q.breakable_force
        end
        if call_operator.comments.empty?
          q.format(call_operator, stackable: false)
        end
        q.format(message) if message != :call
      end
      format_arguments(q)
    end
  end
end