Retrieve the values associated to the specified fields.
<p>
If some of the specified fields do not exist, nil values are returned. Non existing keys are
considered like empty hashes.
<p>
<b>Time complexity:</b> O(N) (with N being the number of fields)
@param key
@param fields
@return Multi Bulk Reply specifically a list of all the values associated with the specified
fields, in the same order of the request.
Retrieve the values associated to the specified fields. <p> If some of the specified fields do not exist, nil values are returned. Non existing keys are considered like empty hashes. <p> <b>Time complexity:</b> O(N) (with N being the number of fields) @param key @param fields @return Multi Bulk Reply specifically a list of all the values associated with the specified fields, in the same order of the request.