in class AbstractExplicitGenerator:

final @NonNull AbstractExplicitGenerator<?> resolveSchemaNode(final @NonNull SchemaNodeIdentifier path,
	final @Nullable QNameModule targetModule) {
	AbstractExplicitGenerator<?> current = this;
	QNameModule currentModule = targetModule; // null initially

	// here comes the augment path where all the QNames up to afi-safi are bound to openconfig-network-instance NS and the rest starting with the l2vpn-evpn
	// are bound to openconfig-bgp-evpn-ext NS
	for (QName next : path.getNodeIdentifiers()) {
		final QName qname = currentModule == null ? next : next.bindTo(currentModule);
		current = verifyNotNull(current.findSchemaTreeGenerator(qname),
			"Failed to find %s as %s in %s", next, qname, current);

		// When we cycle through to bgp container, the NS does not match, as the bgp is copied to openconfig-network-instance:protocol from another module.
		// The currentModule variable is thus changed to the NS of that module (openconfig-bgp).
		// The same happens for next node in the path, i.e. rib container comes from a grouping from openconfig-rib-bgp module that was used in the grouping
		// in the openconfig-bgp module that got copied into openconfig-network-instance:protocol.
		// Then next two nodes (afi-safis and afi-safi) belong to the same NS as the currentModule, so everything goes fine.
		// But then we get to the l2vpn-evpn container which was augmented into afi-safi list from the openconfig-bgp-evpn-ext module.
		// As the currentModule is still set to the openconfig-rib-bgp NS, there l2vpn-evpn qname gets bound to the NS of that module and fails to be
		// found in the current afi-safi list where it is stored with the openconfig-bgp-evpn-ext NS.
		// And thus we get the exception in the verifyNotNull(...)
		final QNameModule foundNamespace = current.getQName().getModule();
		if (!foundNamespace.equals(qname.getModule())) {
			// We have located a different QName than the one we were looking for. We need to make sure we adjust
			// all subsequent QNames to this new namespace
			currentModule = foundNamespace;
		}
	}

	return current;
}