How to dynamically hide a dashboard panel based on drill-down selection?

[akankshayadav]

I am able to show the panel using drilldown by <panel depends="$token_file$".
But how can i hide the panel when work is done. Is there any approach?

[ITWhisperer]

To hide the panel, you need to unset the token (or set it to null which amounts to the same thing). The way I have done it in some instances, is to leverage the drilldown of the displayed panel to unset the token.

[akankshayadav]

what should be the code?
below is my code for setting the token in drilldown

[ITWhisperer]

[akankshayadav]

applying this , i cannot get  my drilldown panel when i click on the token.

my question is .. when i click on the file i see the panel connected by drill down. now i need a dynamic way to remove it so that , the panel disappears. and if i click again on the file then the drilldown should work and show the panel 

[ITWhisperer]

You need this in the drilldown of the panel that opens i.e. the first drilldown shows the panel with the table, the drilldown from that table hides itself - it sounds like you replaced your existing drilldown instead of adding the drilldown to the other panel