I found some of my old code

Content

HP lass Collection implements SteatorAggregate Il Propotics private membas anagO; Collection membes minate onload; il Callback fonction private is roaded false; Il Loaded flag public fonction add3tem(sobj, keq noll, souemite false) sthis- checkallbackO; if (skey) . if (1 soucoonite Se isset( sthis-membeas skeg )) 0002 Enor:instance); senor- ado( "'Beg l' skenl" abeady in ase." ); reton false; else sthis-membeast skeg I sobj; ? else sthis- members sobi; retum tue; poblic function remonttem(skeg) sthis- checkallback0; if (isset( sthis-membras skey )) unset( sthis-members skey else 0002 Enorinstance0)