NodeOPCUA API Documentation
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    Interface VariableWriteContext

    what a timestamped_set_ctx setter is told about the write

    interface VariableWriteContext {
        context?: ISessionContext;
        indexRange?: NumericRange | null;
    }
    Index
    context?: ISessionContext

    the session context of the write; undefined when the write does not come from a session

    indexRange?: NumericRange | null

    the part of the array being written, null or empty for a write of the whole value