Function isTypeSubtypeOf

test/fixtures/snapshot/typescript.js:63839–63841

(source, target)

            return isTypeRelatedTo(source, target, subtypeRelation) ? -1 /* Ternary.True */ : 0 /* Ternary.False */;
        }
        function isTypeSubtypeOf(source, target) {
            return isTypeRelatedTo(source, target, subtypeRelation);
        }
        function isTypeAssignableTo(source, target) {
            return isTypeRelatedTo(source, target, assignableRelation);
        }