assertEquals(1, unknownSchemaNodes.size());
final UnknownSchemaNode unknownSchemaNode = unknownSchemaNodes.iterator().next();
assertEquals("argument", unknownSchemaNode.getNodeParameter());
assertEquals(1, unknownSchemaNodes.size());
final UnknownSchemaNode unknownSchemaNode = unknownSchemaNodes.iterator().next();
assertEquals("argument", unknownSchemaNode.getNodeParameter());