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Virtualization/Infinite scrolling only working when knowing the size/count of the data

Hello,

apparently virtualization and infinite scrolling seems to work with finite data, or data for which we know the count number, i.e. number of data points.

However when using various cloud services for big data, getting the count of the whole data is very time consuming and sometimes not even possible, unless fetching all the data, which in the end is the opposite of the virtualization/infinite scrolling pattern of only showing small chuncks of data and only request more, based on the user's interaction.

Created a sample, where the data is fed by a web service, for which though the count is not set, as we don't know/cannot get the size of it.

Is there any possibility to achieve this?

Thanks in advance!

Best,
Sebastian