public static @Nullable CreateMethodQuickFix createFix(@NotNull PsiClass targetClass, final @NonNls String signature, final @NonNls String body) {
    CreateMethodQuickFix fix = new CreateMethodQuickFix(targetClass, signature, body);
    try {
      fix.createMethod(targetClass);
      return fix;
    }
    catch (IncorrectOperationException e) {
      return null;
    }
  }
public static @Nullable CreateMethodQuickFix createFix(@NotNull PsiClass targetClass, final @NonNls String signature, final @NonNls String body)