* New: In CRL.python.helpers, all methods make use of the quiet mode to
allow completly silent initialisation.
Introduce isderived() function to check the derivation relationship
of two C++ encapsulated classes by Isobar. The Python isinstance do
not work, all C++ wrapped classes are of the base type 'type'.
isderived() uses the MRO mechanism (Method Resolution Order) as a
workaround. I can't find in the documentation if it's the expected
behavior or if i did miss something in when building my classes.
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