What is the use of FirstLastPopClndIndex function
How does this function FirstLastPopClndIndex works:
START_INDEX:measure_x = FirstLastPopClndIndex(source:measure_y)
Is this function used to find out the first and last calendar index on the populated cell for this measure provided in the RHS? Depending whatever we mentioned in the LHS measure with START_INDEX or END_INDEX?
Anywhere or in the documentation I can find about this function?