final Mutable<QName, Y, Z> ret = (Mutable<QName, Y, Z>) copySubstatement((Mutable<?, ?, ?>) template)
.orElseThrow(
() -> new InferenceException(this, "Failed to materialize child %s template %s", qname, template));
final Mutable<QName, Y, Z> ret = (Mutable<QName, Y, Z>) copySubstatement((Mutable<?, ?, ?>) template)
.orElseThrow(
() -> new InferenceException(this, "Failed to materialize child %s template %s", qname, template));