static @Nullable CollectionType create(@NotNull PsiMethodCallExpression call) {
      CollectionType type = MAPPER.mapFirst(call);
      if (type == null) return null;
      PsiType expectedType = ExpectedTypeUtils.findExpectedType(call, false);
      if (expectedType == null) return null;
      PsiClassType newType = TypeUtils.getType(type.myMutableClass, call);
      return expectedType.isAssignableFrom(newType) ? type : null;
    }
static @Nullable CollectionType create(@NotNull PsiMethodCallExpression call)