Decode a `u32` length prefix, and then drain the length of the body. Upon success, returns the number of bytes drained sans the length of the `u32` length prefix (4-bytes). # Errors - Propagates errors returned from [`Reader::read_prefixed`]. - Propagates errors returned from [`Reader::drain`].
(&mut self)
source not stored for this graph (policy: none)
no test coverage detected