Gets the registry item for the given name and type. This can be either a class or an object.
The type of the plugin. (e.g. Field, Renderer)
The plugin's name. (Ex. field_angle, geras)
Optional
Whether or not to throw an error if we are unable to find the plugin.
The class or object with the given name and type or null if none exists.
Gets the registry item for the given name and type. This can be either a class or an object.