Returns number of blocks
Returns number of non empty blocks
systems which are listening for added entities
alignment of whole entity
systems which are listening for changed entities (changed in term of contained components)
cached new infos after adding component
cached new infos after removing component
entity components
deltas in memory for components in EntitiesBlock
pointer to first block/page
pointer to last block
max number of entities in block
systems which are listening for removed entities
size of entity (with alignment respect)
array of systems which will update this entity
deltas in memory for components in EntityTemplate
pointer to last updated block
Entity type info.