How can I change the width of multi-measure rests in the irregular measure?

[takumi ikeda]

\version "2.19.81"

{
  \compressFullBarRests
  \set Score.restNumberThreshold = #0
  \time 5/4
  R4*5
  \time 4/4
  R1*2

}

{
  \compressFullBarRests
  \set Score.restNumberThreshold = #0
  \override Staff.MultiMeasureRest.space-increment = 10
  \time 5/4
  R4*5
  \time 4/4
  R1*2
}

% Thanks,
% Takumi