code: function _parseLeafToken(token) {
    const [, name, remainder] = token.match(LEAF_REGEX);
  
    return {
      name: name.toLowerCase(),
      params: _parseParams(remainder),
    };
  }
docs: @private
  
  Parses a leaf token into tree object
  
  @params {string} token - name and params
  @return {Object}