def __init__(self, timed=False):
self._processors = [] <EOL>self._next_entity_id = <NUM_LIT:0><EOL>self._components = {}<EOL>self._entities = {} <EOL>self._dead_entities = set()<EOL>if timed:<EOL><INDENT>self.process_times = {}<EOL>self._process = self._timed_process<EOL><DEDENT>
A World object keeps track of all Entities, Components, and Processors.

        A World contains a database of all Entity/Component assignments. It also
        handles calling the process method on any Processors assigned to it.