// and num_dims) are "compatible" (i.e. they occupy the same number of bytes).
// Specifically, given from_type_size = TF_DataTypeSize(TF_TensorType(from)):
//
// ShapeElementCount(dims, num_dims) * TF_DataTypeSize(type)
//
// must equal
//
// TF_TensorElementCount(from) * from_type_size
//
// where TF_ShapeElementCount would be the number of elements in a tensor with