a way to specify when the data ends or the number of data rows to import when using multiple files import

[tova]

When using multiple file import, I would like a way to specify how many rows i want to import from the file.

[hogi]

I just found this wish from 2019. unfortunately, still pending ...
In 2023, I submitted a duplicate:Multi-File-Import: restrict number of lines to read 

A fixed number of lines is a quite rare case, to account for a variable number of lines to be read,
a character sequence can be used to identify the end of the block of data.

e.g. 2 new lines
MFI (<< end of DATA block("\!n\!n"))