Function wrong_type 

pub fn wrong_type() -> Error

What Redis says when a command is sent at a key holding another type.

The text is Redis’s, word for word, because it goes on the wire verbatim and clients match on it. The WRONGTYPE at the front is not part of the message: the protocol layer puts it there from the Code, which is what lets an embedded caller match on a value instead of on a string (P5).