lib/token.js
function LiteralToken(literal, root, parent, options) {
  LiteralToken._superclass.call(this, root, parent, options);
  this.literal = literal;
}
function LiteralToken(literal, root, parent, options) {
  LiteralToken._superclass.call(this, root, parent, options);
  this.literal = literal;
}
/*
Literal token
 /*
Initialize `LiteralToken`, with `parent`, `root` and `literal`

@param {String} literal
@param {BaseToken} parent
@api private
@extends BaseToken
@constructor