usestd::fmt;/// Errors from parsing or serializing RFC 4575 conference-info XML.
#[derive(Debug, Clone)]#[non_exhaustive]pubenumConferenceInfoError{/// XML parsing or serialization error.
Xml(String),}implfmt::Display forConferenceInfoError{fnfmt(&self, f:&mutfmt::Formatter<'_>)->fmt::Result{matchself{Self::Xml(msg)=>write!(f,"conference-info XML error: {msg}"),}}}implstd::error::Error forConferenceInfoError{}