isSubclassOf abstract method
bool isSubclassOf(Returns whether the class denoted by the receiver is a subclass of the class denoted by the argument.
Note that the subclass relationship is reflexive.
Source
bool isSubclassOf(ClassMirror other);
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https://api.dartlang.org/stable/1.24.3/dart-mirrors/ClassMirror/isSubclassOf.html