known - check whether a name is defined in a dictionary or object
dict /key known -> bool
int /key known -> bool
modeldict /iaf_psc_alpha known -> true
modeldict /parkinson_neuron known -> false
/iaf_psc_alpha_ps GetDefaults /Interpol_Order known -> false
docu edited by Sirko Straube
/usr/src/packages/BUILD/sli/slidict.cc