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: config_test_helper.go
    path of file: ./repos/wasmer-go/wasmer
    
    the code of the file until where you have to start completion: package wasmer

// #include <wasmer.h>
// extern uint64_t metering_delegate_alt(enum wasmer_parser_operator_t op);
import "C"
import "unsafe
    
func metering_delegate_alt(op C.wasmer_parser_operator_t) C.uint64_t {
	// a simple algorithm for now just map from opcode to cost directly
	// all the responsibility is placed on the caller of PushMeteringMiddleware
	v, b := opCodeMap[Opcode(op)]
	if !b {
		return 0 // no value means no cost
	}
	return C.uint64_t(v)
}