CodeQL library for Python
codeql/python-all 0.12.1 (changelog, source)

Member predicate Expr::refersTo

NOTE: refersTo will be deprecated in 2019. Use pointsTo instead. Gets what this expression might “refer-to”. Performs a combination of localized (intra-procedural) points-to analysis and global module-level analysis. This points-to analysis favours precision over recall. It is highly precise, but may not provide information for a significant number of flow-nodes. If the class is unimportant then use refersTo(value) or refersTo(value, origin) instead. NOTE: For complex dataflow, involving multiple stages of points-to analysis, it may be more precise to use ControlFlowNode.refersTo(...) instead.

predicate refersTo(Object obj, ClassObject cls, AstNode origin)