docs: Pointer valInMulti(final T val, final int elements) {
      final long ptrVal2SizeOff = MDB_VAL_STRUCT_SIZE + STRUCT_FIELD_OFFSET_SIZE;
      ptrArray.putLong(ptrVal2SizeOff, elements); // ptrVal2.size
      proxy.in(val, ptrVal, ptrValAddr); // ptrVal1.data
      final long totalBufferSize = ptrVal.getLong(STRUCT_FIELD_OFFSET_SIZE);
      final long elemSize = totalBufferSize / elements;
      ptrVal.putLong(STRUCT_FIELD_OFFSET_SIZE, elemSize); // ptrVal1.size
  
      return ptrArray;
    }