Type Alias FilterSyncAssertions<MixedAssertions>

FilterSyncAssertions: MixedAssertions extends readonly [
    infer MixedAssertion extends AnyAssertion,
    ...(infer Rest extends readonly AnyAssertion[]),
]
    ? MixedAssertion extends AnySyncAssertion
        ? readonly [MixedAssertion, ...FilterSyncAssertions<Rest>]
        : FilterSyncAssertions<Rest>
    : readonly []

Given a mixed array of assertions, extracts only the synchronous assertions.