CodeQL can't find the C++ API xmlFree from libxml2

[lvtao-sec]

I'm running CodeQL on libxml2, but it returns nothing when execute from FunctionCall fc fc.getTarget().hasName("xmlFree"). Acctually it really has this API.

[geoffw0]

Hi, do you know where xmlFree is defined or declared?

[jbj]

Is it possible that xmlFree is a macro rather than a function?