///
/// Returns the vertical component of the line's vector.
///
/// **See also:** [`dx()`]
Returns the vertical component of the line's vector.
Returns the vertical component of the line ' s vector .
pub fn dy(&self) -> i32 {
        let (obj_data, funcs) = self.get_line_obj_funcs();
        unsafe {
            let ret_val = ((*funcs).dy)(obj_data);
            ret_val
        }
    }
pub fn dy ( & self ) -> i32 { let ( obj_data , funcs ) = self . get_line_obj_funcs ( ) ; unsafe { let ret_val = ( ( * funcs ) . dy ) ( obj_data ) ; ret_val } }
Returns the vertical component of the line's vector.
Returns the vertical component of the line ' s vector .
&self