LinkedListTree ast = ASTUtils.newImaginaryAST(AS3Parser.E4X_FILTER);
assertNoParent("target expression", target);
assertNoParent("query expression", target);
// don't use addChildWithTokens(); special handling below,
ast.addChildWithTokens(target);
ast.appendToken(TokenBuilder.newDot());
ast.appendToken(TokenBuilder.newLParen());
ast.addChildWithTokens(selector);
ast.appendToken(TokenBuilder.newRParen());
return ast;
}