hollow/src/main/java/com/netflix/hollow/core/write/objectmapper/HollowObjectMapper.java
public void initializeTypeState(Class<?> clazz) {
        Objects.requireNonNull(clazz);
        getTypeMapper(clazz, null, null);
    }
public void initializeTypeState(Class<?> clazz) {
        Objects.requireNonNull(clazz);
        getTypeMapper(clazz, null, null);
    }
Initializes the schema for the specified type in the data model.
<p>
The schema will be derived from the field and type names in
<code>clazz</code> and added to the state engine's data model;
schemas of types referenced from <code>clazz</code> will also be added.
This can be used to add a type's schema to the state engine
without having to add any data for that type.

@param clazz type whose schema to derive and add to the data model
@see #add(Object)