In postgis i can flatten compound geometries like so
SELECT ST_AsText(ST_CurveToLine(ST_GeomFromText('COMPOUNDCURVE (CIRCULARSTRING (576285.49817038781 7034469.7208286244, 576325.10797829565 7034483.5911118472, 576367.02 7034485.76), (576367.02 7034485.76, 576396.53 7034483.05), CIRCULARSTRING (576396.53 7034483.05, 576447.15568394249 7034473.94116881, 576495.46 7034456.26, 576500.76470677822 7034454.0120333815, 576506.21 7034452.13, 576508.88920362911 7034451.3602161128, 576511.59 7034450.67), (576511.59 7034450.67, 576517.82000000007 7034449.45), CIRCULARSTRING (576517.82000000007 7034449.45, 576521.86965882347 7034448.9300352931, 576525.94000000006 7034448.61, 576543.62140925834 7034449.5502338214, 576560.694903961 7034454.2419341141))')))
But how do i do the same thing in FME?
ArcStroker can only flatten Circular strings, but not compound geometries?