schema/lexer.go
func NewLexer(name, input string, h Handler) *Lexer {
	return &Lexer{
		Name:    name,
		input:   input + "\n",
		state:   lexText,
		handler: h,
	}
}
func NewLexer(name, input string, h Handler) *Lexer {
	return &Lexer{
		Name:    name,
		input:   input + "\n",
		state:   lexText,
		handler: h,
	}
}
// NewLexer creates a new scanner from the input