public Task <long> PTtlAsync(string key) => MultiAsync(KeyCommands.PTtl(key));
public long PTtl(string key) => Multi(KeyCommands.PTtl(key));
public Task <long> PTtlAsync(string key) => MultiAsync(KeyCommands.PTtl(key));
public long PTtl(string key) => Multi(KeyCommands.PTtl(key));