isSubtypeOf abstract method

bool isSubtypeOf(
  1. DartType leftType,
  2. DartType rightType
)

Return true if the leftType is a subtype of the rightType.

For the Dart 2.0 type system, the rules governing the subtype relationship are given in the Dart Language Specification, section 19.4 Subtypes.

Other type systems may define this operation differently.

Implementation

bool isSubtypeOf(DartType leftType, DartType rightType);