in src/lib.rs [305:317]
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
ErrorKind::InvalidValue => write!(
f,
"One or more parameters have not legal values for the command"
),
ErrorKind::InvalidOperation => write!(
f,
"The combination of parameters is not legal for the command"
),
ErrorKind::NotEnoughData => write!(f, "Not enough data provided"),
}
}