Make paper-datatable work without needing the number of rows / datasource length ?

[cstavaru]

Sometimes (in fact, many times in production) obtaining the total number of rows in a table is an expensive operation, and also that number is not very accurate either (new rows can be appended to the table in real time). Is there any way to make this element work with a datasource of unknown size ? Maybe just put "Next Page/Prev Page" on the bottom navigation bar, and just never rely on knowing the actual number of rows within the code ?