public PsiMethodCallExpression extractGetCall(PsiElement element) {
      if (!(element instanceof PsiExpression)) return null;
      PsiMethodCallExpression getCall = extractMapMethodCall((PsiExpression)element, "get");
      if (getCall == null) return null;
      PsiExpression[] args = getCall.getArgumentList().getExpressions();
      return args.length == 1 && isKey(args[0]) && isMap(getCall.getMethodExpression().getQualifierExpression()) ? getCall : null;
    }
public PsiMethodCallExpression extractGetCall(PsiElement element)