docs: function RegExpStringMapper(options) {
  	if (!(this instanceof RegExpStringMapper)) {
  		return new RegExpStringMapper(options);
  	}
  	options = options || {};
  	this._formatters = [];
  	this.addFormatter(createDefaultFormatter(options.serialize || getSerializeFn()));
  	this.addFormatter(createMomentFormatter(options.moment));
  	this._separator  = options.separator || '%';
  	this._regex      = buildDefaultRegex(this._separator);
  	this._magic      = '@RegExpStringMapper';
  	this._separatorRegExp = RegExp(this._separator + this._separator, 'g');
  	this._magicRegExp = RegExp(this._magic, 'g');
  }