astLogicalExpression(logNode, retArr) {
    retArr.push('(');
    this.astGeneric(logNode.left, retArr);
    retArr.push(logNode.operator);
    this.astGeneric(logNode.right, retArr);
    retArr.push(')');
    return retArr;
  }
@desc Parses the abstract syntax tree for *Logical* Expression
@param {Object} logNode - An ast Node
@param {Array} retArr - return array string
@returns {Array} the append retArr