You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: rpc_function.go
    path of file: ./repos/tegola/vendor/github.com/aws/aws-lambda-go/lambda
    
    the code of the file until where you have to start completion: // Copyright 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.

//go:build !lambda.norpc
// +build !lambda.norpc

package lambda

import (
	"context"
	"encoding/json"
	"errors"
	"log"
	"net"
	"net/rpc"
	"os"
	"time"

	"github.com/aws/aws-lambda-go/lambda/messages"
	"github.com/aws/aws-lambda-go/lambdacontext"
)

func init() {
	// Register `startFunctionRPC` to be run if the _LAMBDA_SERVER_PORT environment variable is set.
	// T
    
func (fn *Function) Invoke(req *messages.InvokeRequest, response *messages.InvokeResponse) error {
	defer func() {
		if err := recover(); err != nil {
			response.Error = lambdaPanicResponse(err)
		}
	}()

	deadline := time.Unix(req.Deadline.Seconds, req.Deadline.Nanos).UTC()
	invokeContext, cancel := context.WithDeadline(fn.baseContext(), deadline)
	defer cancel()

	lc := &lambdacontext.LambdaContext{
		AwsRequestID:       req.RequestId,
		InvokedFunctionArn: req.InvokedFunctionArn,
		Identity: lambdacontext.CognitoIdentity{
			CognitoIdentityID:     req.CognitoIdentityId,
			CognitoIdentityPoolID: req.CognitoIdentityPoolId,
		},
	}
	if len(req.ClientContext) > 0 {
		if err := json.Unmarshal(req.ClientContext, &lc.ClientContext); err != nil {
			response.Error = lambdaErrorResponse(err)
			return nil
		}
	}
	invokeContext = lambdacontext.NewContext(invokeContext, lc)

	// nolint:staticcheck
	invokeContext = context.WithValue(invokeContext, "x-amzn-trace-id", req.XAmznTraceId)
	os.Setenv("_X_AMZN_TRACE_ID", req.XAmznTraceId)

	payload, err := fn.handler.Invoke(invokeContext, req.Payload)
	if err != nil {
		response.Error = lambdaErrorResponse(err)
		return nil
	}
	response.Payload = payload
	return nil
}