/// <summary>
/// Add an entity part to an entity. If the part doesn't have an Id yet, a new Id will be assigned.
/// </summary>
public void AddPart(long entityId, EcsEntityPart part)
{
if (part.Id == 0L)
{
part.Id = NewId();
}
_entityIdsToEntityParts[entityId].Add(part);
}
public void RemovePart(long entityId, EcsEntityPart part)
{
_entityIdsToEntityParts[entityId].Remove(part);
}