[Gimp-developer] How is supposed to work the "dash_offset" when stroking paths in line mode?

[Ofnuts <ofnuts gmx com>]

*  the Python help says the input value range for "set" is 1..100 while
the output value range for "get" is 0..2000

* whatever the value I seem to always get the same result

Is this supposed to shift the dash pattern? Is it an absolute value or
is it relative to the dash pattern length?

Assuming I have a pattern like:

"####  ##  ####  ##  ####  ##"

what do I need to do to stroke it as:

"  ####  ##  ####  ##  ####  ##"