code: function getNamedProps(pattern) {
    var regex = /\[(\w+):(\w+)?]/g;
    var props = [];
    var i = 0;
  
    pattern.replace(regex, function () {
      props.push((arguments.length <= 2 ? undefined : arguments[2]) || i++);
      return "";
    });
  
    return props;
  }
docs: Return a list of named props, where name refers to `name` in `[filter:name]`.
  
  @param   {string}    pattern   Pattern to get props from
  @return  {Array}               Array of named props