TensorStore
tensorstore::StorageGeneration::IsNoValue
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    #include "tensorstore/kvstore/generation.h"
    static bool tensorstore::StorageGeneration::IsNoValue(
            const StorageGeneration& generation);

    Returns true if generation is equal to the special NoValue() generation.

    Warning

    While all kvstore drivers support StorageGeneration::NoValue() in store::ReadGenerationConditions::if_equal` and kvstore::ReadGenerationConditions::if_not_equal, some kvstore drivers may return a different generation for missing values.