ASToken compareToken = new ASToken(ASTokenTypes.TOKEN_OPERATOR_EQUAL, -1, -1, -1, -1, "==");
BinaryOperatorNodeBase nullCheck = BinaryOperatorNodeBase.create(compareToken, new IdentifierNode("bytes"), new LiteralNode(LiteralType.NULL, nullToken));
IfNode ifStmt = new IfNode(null);
ConditionalNode cNode = new ConditionalNode(null);
cNode.setConditionalExpression(nullCheck);
ifStmt.addBranch(cNode);
movieClipDataContents.addItem(ifStmt);
BlockNode ifContents = cNode.getContentsNode();
// generate: bytes = ByteArray(new $assetByteArray());
ASToken newToken = new ASToken(ASTokenTypes.TOKEN_KEYWORD_NEW, -1, -1, -1, -1, IASKeywordConstants.NEW);