Function cairo_sys::cairo_pattern_get_radial_circles

pub unsafe extern fn cairo_pattern_get_radial_circles(pattern: *mut cairo_pattern_t,
                                                      x0: *mut c_double,
                                                      y0: *mut c_double,
                                                      r0: *mut c_double,
                                                      x1: *mut c_double,
                                                      y1: *mut c_double,
                                                      r1: *mut c_double)
                                                      -> Status