methods for retrieving and setting visible/invisible layers
methods for retrieving and setting visible/invisible layers

mvdstruijk/flamingo,mvdstruijk/flamingo,flamingo-geocms/flamingo,mvdstruijk/flamingo,B3Partners/flamingo,B3Partners/flamingo,flamingo-geocms/flamingo,B3Partners/flamingo,flamingo-geocms/flamingo,B3Partners/flamingo,mvdstruijk/flamingo,flamingo-geocms/flamingo