pub fn is(&self, sel: &str) -> bool {
        if self.length() > 0 {
            return Matcher::new(sel)
                .map(|matcher| self.is_matcher(&matcher))
                .unwrap_or(false);
        }

        false
    }
/// Checks the current matched set of elements against a selector and
/// returns true if at least one of these elements matches.
Checks the current matched set of elements against a selector and
returns true if at least one of these elements matches.
Checks the current matched set of elements against a selector and returns true if at least one of these elements matches .
pub fn is(&self, sel: &str) -> bool {
        if self.length() > 0 {
            return Matcher::new(sel)
                .map(|matcher| self.is_matcher(&matcher))
                .unwrap_or(false);
        }
        false
    }
pub fn is ( & self , sel : & str ) -> bool { if self . length ( ) > 0 { return Matcher :: new ( sel ) . map ( | matcher | self . is_matcher ( & matcher ) ) . unwrap_or ( false ) ; } false }
Checks the current matched set of elements against a selector and
returns true if at least one of these elements matches.
Checks the current matched set of elements against a selector and returns true if at least one of these elements matches .
&self
sel
&str
&self
sel
&str