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: lock.go
    path of file: ./repos/corteza/server/vendor/github.com/doug-martin/goqu/v9/exp
    
    the code of the file until where you have to start completion: package exp

type (
	LockStrength int
	WaitOption   int
	Lock         interface {
		Streng
    
func NewLock(strength LockStrength, option WaitOption, of ...IdentifierExpression) Lock {
	return lock{
		strength:   strength,
		waitOption: option,
		of:         of,
	}
}