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    (#174) CRM_Utils_Cache_Interface::flush() - Return bool like PSR-16 · 124e5288
    totten authored
    The function signature for `flush()` did not specify a return value, and
    actual behaviors varied depending on the driver (`bool` for memcache,
    `int` for redis, and `void` for others).
    
    This standardizes on returning a bool -- which makes the signature align
    with PSR-16's `clear()`.
    124e5288