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API > API/Runtime > API/Runtime/MassEntity > API/Runtime/MassEntity/FMassEntityQuery
Description
Calculates a hash of the entity order revisions in all archetypes. If returned value ever differs from a previous call it indicates that one or more archetypes associated with this query have been updated by having the entity order changed.
| Name | CalculateArchetypeEntityOrderHash |
| Type | function |
| Header File | /Engine/Source/Runtime/MassEntity/Public/MassEntityQuery.h |
| Include Path | #include "MassEntityQuery.h" |
| Source | /Engine/Source/Runtime/MassEntity/Private/MassEntityQuery.cpp |
uint64 CalculateArchetypeEntityOrderHash()