DMA FIFO reading: reads + removes?

[Cashany]

Just to double check:

An invoke method for reading DMA FIFO : reads and removes the oldest element(s) from the FPGA FIFO ?

I mean it removes after reading? Porbaly removes.

It is not expelicitly mentioned in the documentation: 

[T-REX$ · Accepted solution]

Yes, the read is destructive (meaning it removes the element from the FIFO).