isSubtypeOf abstract method

bool isSubtypeOf(TypeMirror other)

Checks the subtype relationship, denoted by <: in the language specification.

This is the type relationship used in is test checks.

Source

bool isSubtypeOf(TypeMirror other);

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https://api.dartlang.org/stable/1.24.3/dart-mirrors/TypeMirror/isSubtypeOf.html