Function obs_sys::obs_properties_add_float_slider

pub unsafe extern "C" fn obs_properties_add_float_slider(
    props: *mut obs_properties_t, 
    name: *const c_char, 
    description: *const c_char, 
    min: f64, 
    max: f64, 
    step: f64
) -> *mut obs_property_t