void (boolean receiver, @NotNull PsiElement anchor) { if (receiver) { if (anchor instanceof PsiMethodReferenceExpression methodRef) { anchor = methodRef.getReferenceNameElement(); } else if (anchor instanceof PsiMethodCallExpression call) { anchor = call.getMethodExpression().getReferenceNameElement(); } if (anchor != null) { myReceiverMutabilityViolation.add(anchor); } } else { myArgumentMutabilityViolation.add(anchor); } }