Function webkit2gtk_sys::webkit_user_style_sheet_new_for_world

pub unsafe extern "C" fn webkit_user_style_sheet_new_for_world(
    source: *const c_char, 
    injected_frames: WebKitUserContentInjectedFrames, 
    level: WebKitUserStyleLevel, 
    world_name: *const c_char, 
    allow_list: *const *const c_char, 
    block_list: *const *const c_char
) -> *mut WebKitUserStyleSheet

This is supported on crate feature v2_22 only.