Undo a {@link #expire(const(ubyte)[], int) expire} at turning the expire key into a normal key.
<p>
Time complexity: O(1)
@param key
@return Integer reply, specifically: 1: the key is now persist. 0: the key is not persist (only
happens when key not set).
Undo a {@link #expire(const(ubyte)[], int) expire} at turning the expire key into a normal key. <p> Time complexity: O(1) @param key @return Integer reply, specifically: 1: the key is now persist. 0: the key is not persist (only happens when key not set).