pub fn is_null(&self) -> bool {
        let (obj_data, funcs) = self.get_margins_obj_funcs();
        unsafe {
            let ret_val = ((*funcs).is_null)(obj_data);
            ret_val
        }
    }
///
/// Returns `true` if all margins are is 0; otherwise returns
/// false.
Returns `true` if all margins are is 0; otherwise returns
false.
Returns ` true ` if all margins are is 0 ; otherwise returns false .
pub fn is_null(&self) -> bool {
        let (obj_data, funcs) = self.get_margins_obj_funcs();
        unsafe {
            let ret_val = ((*funcs).is_null)(obj_data);
            ret_val
        }
    }
pub fn is_null ( & self ) -> bool { let ( obj_data , funcs ) = self . get_margins_obj_funcs ( ) ; unsafe { let ret_val = ( ( * funcs ) . is_null ) ( obj_data ) ; ret_val } }
Returns `true` if all margins are is 0; otherwise returns
false.
Returns ` true ` if all margins are is 0 ; otherwise returns false .
&self
&self