Loads an entity of the given type EntityType specified by its id. The id can be a simple or multipart value. You can choose to load only Id fields, or all single value fields, or all multivalue fields, or all temporal fields, or any combination of the the above mentioned cases. Warning: all fields that are not loaded must be nullable.

Loads an entity of the given type EntityType specified by its id. The id can be a simple or multipart value. You can choose which the fields to load. Warning: all fields that are not loaded must be nullable.