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: grpclb_config.go
    path of file: ./repos/teller/vendor/google.golang.org/grpc/balancer/grpclb
    
    the code of the file until where you have to start completion: /*
 *
 * Copyright 2019 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in
    
func childIsPickFirst(sc *grpclbServiceConfig) bool {
	if sc == nil {
		return false
	}
	childConfigs := sc.ChildPolicy
	if childConfigs == nil {
		return false
	}
	for _, childC := range *childConfigs {
		// If round_robin exists before pick_first, return false
		if _, ok := childC[roundRobinName]; ok {
			return false
		}
		// If pick_first is before round_robin, return true
		if _, ok := childC[pickFirstName]; ok {
			return true
		}
	}
	return false
}