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API > API/Runtime > API/Runtime/NetCore > API/Runtime/NetCore/FFastArraySerializer > API/Runtime/NetCore/FFastArraySerializer/TFastArraySerializeHelper
Description
Conditionally rebuilds the ID to Index map for items. This is generally only necessary on first serialization, or if we receive deletes and can no longer trust our ordering is correct.
| Name | ConditionalRebuildItemMap |
| Type | function |
| Header File | /Engine/Source/Runtime/Net/Core/Classes/Net/Serialization/FastArraySerializer.h |
| Include Path | #include "Net/Serialization/FastArraySerializer.h" |
void ConditionalRebuildItemMap()