pub fn with_format_fn(f: impl Fn(&T) -> String + 'static) -> Self {
        ParseFormatter {
            fmt_fn: Box::new(f),
        }
    }
/// Create a new `ParseFormatter` using the provided formatting function.
/// provided function.
Create a new `ParseFormatter` using the provided formatting function.
provided function.
Create a new ` ParseFormatter ` using the provided formatting function . provided function .
pub fn with_format_fn(f: impl Fn(&T) -> String + 'static) -> Self {
        ParseFormatter {
            fmt_fn: Box::new(f),
        }
    }
pub fn with_format_fn ( f : impl Fn ( & T ) -> String + ' static ) -> Self { ParseFormatter { fmt_fn : Box :: new ( f ) , } }
Create a new `ParseFormatter` using the provided formatting function.
Create a new ` ParseFormatter ` using the provided formatting function .
f
impl Fn(&T) -> String + 'static
f
impl Fn(&T) -> String + 'static