Frenched parts

[Paul Scott]

Would it not be fairly easy to create a variation of 
\RemoveEmptyStaffContext so that lines consisting only of rests would be 
reduced at least to one line of multimeasure rests so the flute, etc. 
player can count their rests?  It is typical of French instrumental 
parts to put each pair of instruments on a score which has two staves 
when the parts are different and one staff when the two instruments play 
the same thing ( a2 ).  This is common in orchestral music of Ravel, 
Debussy, etc. and it works fine to use \RemoveEmptyStaffContext except 
when both instruments have rests that happen to occupy a whole line.

TIA for considering this,

Paul Scott