code: void verifyAllReferencesInlined(String name, FunctionState functionState) {
      for (Reference ref : functionState.getReferences()) {
        if (!ref.inlined) {
          Node parent = ref.callNode.getParent();
          throw new IllegalStateException(
              "Call site missed ("
                  + name
                  + ").\n call: "
                  + ref.callNode.toStringTree()
                  + "\n parent:  "
                  + ((parent == null) ? "null" : parent.toStringTree()));
        }
      }
    }
docs: Check to verify that expression rewriting didn't make a call inaccessible.