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API > API/Runtime > API/Runtime/IrisCore > API/Runtime/IrisCore/UDataStream
Description
Called before any calls to potential WriteData, if it returns EWriteData::NoData no other calls will be made. The purpose of the method is to enable a DataStream to setup data that can persist over multiple calls to WriteData if bandwidth allows.
Derived Overrides
| Name | BeginWrite |
| Type | function |
| Header File | /Engine/Source/Runtime/Net/Iris/Public/Iris/DataStream/DataStream.h |
| Include Path | #include "Iris/DataStream/DataStream.h" |
| Source | /Engine/Source/Runtime/Net/Iris/Private/Iris/DataStream/DataStream.cpp |
virtual EWriteResult BeginWrite
(
const FBeginWriteParameters & Params
)