/// Returns the maximum `LevelFilter` that this filter instance is
/// configured to output.
Returns the maximum `LevelFilter` that this filter instance is
configured to output.
Returns the maximum ` LevelFilter ` that this filter instance is configured to output .
pub fn filter(&self) -> LevelFilter {
        self.directives
            .iter()
            .map(|d| d.level)
            .max()
            .unwrap_or(LevelFilter::Off)
    }
pub fn filter ( & self ) -> LevelFilter { self . directives . iter ( ) . map ( | d | d . level ) . max ( ) . unwrap_or ( LevelFilter :: Off ) }
Returns the maximum `LevelFilter` that this filter instance is
configured to output.
Returns the maximum ` LevelFilter ` that this filter instance is configured to output .
&self