astFunctionDeclaration(ast, retArr) {
    if (this.isChildFunction(ast)) {
      return retArr;
    }
    return this.astFunction(ast, retArr);
  }
@desc Parses the abstract syntax tree for to its *named function declaration*
@param {Object} ast - the AST object to parse
@param {Array} retArr - return array string
@returns {Array} the append retArr