is a library callback function that puts a clone of into .
- Used in C/C++ code in a library function called from Mathematica.
- A nonzero error code value will be returned if the dimensions are negative or if there is not sufficient memory.
- The destination should either be null (0) or an MTensor allocated with MTensor_new.
- If is null then a new MTensor is created.
- If is an allocated MTensor then the data in will be modified.