Frenched parts for instruments with long rests

[Paul Scott]

Hi,

Using \RemoveEmptyStaffContext removes all staves on lines after the 
first system if they all contain rests, etc.  All that get left are the 
rehearsal marks.  Is there any real example where this is needed?  In 
every example where I am writing parts I want the first line of every 
system to be present even if all instruments in that score are resting.

This may not ever happen in a full score but it happens for me all the 
time when I "French" parts for a section like clarinets or trumpets.

Is there currently a way to cause the first staff of every system to 
exist even if it is all rests?

TIA,

Paul Scott