<put algortithm description here>
<put parameter description here>
Options:
Default: 0
<put parameter description here>
Default: 1.0
<put parameter description here>
Default: 0,1,0,1
<put parameter description here>
Default: 100.0
processing.runalg('saga:bsplineapproximation', shapes, field, target, level, output_extent, user_size, user_grid)