NewFlagMaker creates a default FlagMaker which creates namespaced flags.

NewFlagMakerAdv gives full control to create flags.

NewFlagMakerFlagSet gives full control to create flags.

ParseArgs parses the string arguments which should not contain the program name.

FlagMaker enumerate all the exported fields of a struct recursively and create corresponding command line flags.

FlagMakingOptions control the way FlagMaker's behavior when defining flags.