[Feature] Converting multidimensional arrays to streaming buffer

[slbioig]

Describe the solution you'd like
I was trying to figure out how to convert partial dimensions of multidimensional array into Streaming buffer in order to create array of FIFOs. And I found this example.
s.to(MockBuffer(s.top_func_name, "A_FIFO"), [0, 1], axis = 0, depth=1)
I don't understand how this works, but it seems like this line of code converts last few dimensions of multidimensional array in to streaming buffers. The number of dimensions are determined by '[0, 1]', but it always converts last dimensions into streaming buffer and I couldn't figure out how to determine which dimensions to convert.
Is there any way to specify which dimensions to convert?