pub fn binds_var(&self, var: &Var) -> bool {
        match self.bindings.get(&var.index) {
            Some(ref slot) => self.slots.contains_key(slot),
            None => false
        }
    }
/// Returns `true` if the variable is bound in the state.
Returns `true` if the variable is bound in the state.
Returns ` true ` if the variable is bound in the state .
pub fn binds_var(&self, var: &Var) -> bool {
        match self.bindings.get(&var.index) {
            Some(ref slot) => self.slots.contains_key(slot),
            None => false
        }
    }
pub fn binds_var ( & self , var : & Var ) -> bool { match self . bindings . get ( & var . index ) { Some ( ref slot ) => self . slots . contains_key ( slot ) , None => false } }
Returns `true` if the variable is bound in the state.
Returns ` true ` if the variable is bound in the state .
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