code: function(segment, strict) {
  		if (!_.isString(segment)) {
  			throw new TypeError('segment must be of type string');
  		}
  		return segment === module.exports.reformatSegment(segment, strict);
  	}
docs: Checks if fs segment is valid
  
  @param  {String} segment
  @param  {Boolean=true} strict
  @return {Boolean}