Get TileDB Query result buffer element sizeSource:
The underlying library functions returns a pair of values as a vector of length two. The first number is the number of element offsets for variable size attributes (and always zero for fixed-sized attributes and coordinates). The second is the number of elements in the data buffer. For variable-sized attributes the first number is the number of cells read (and hence the number of offsets), the second number is the number of elements in the data buffer.
As this function was first made available when only a scalar (corresponding to the second result) was returned, we still return that value.