Structure of Entity. It's have only ID, but have full konwlege to get to components memory (If pointer to it is proper).
Get specified component. If component doesn't exist function retun null. Pointer is valid only before next "commit()", "begin()" or "end()" function is called. Returned pointer shouldn't be used to store reference to entity data.
Entity ID.
See Implementation
Structure of Entity. It's have only ID, but have full konwlege to get to components memory (If pointer to it is proper).