Method idMethod = getIdMethod(field);
NoSqlId idAnno = field.getAnnotation(NoSqlId.class);
MetaIdField<T> metaField = idMetaProvider.get();
KeyGenerator gen = null;
if(idAnno.usegenerator()) {
Class<? extends KeyGenerator> generation = idAnno.generation();
gen = ReflectionUtil.create(generation);
}