modules/jooby-cassandra/src/main/java/org/jooby/cassandra/Datastore.java
public <T> ListenableFuture<T> getAsync(final Class<T> entityClass, final Object id) {
    return mapper(entityClass).getAsync(id);
  }
public <T> ListenableFuture<T> getAsync(final Class<T> entityClass, final Object id) {
    return mapper(entityClass).getAsync(id);
  }
Fetch an entity based on its primary key.

@param entityClass Entity class.
@param id Object id.
@return A ListenableFuture containing an entity or <code>null</code>