Function webkit2gtk_webextension_sys::webkit_dom_css_style_sheet_insert_rule

pub unsafe extern "C" fn webkit_dom_css_style_sheet_insert_rule(
    self_: *mut WebKitDOMCSSStyleSheet, 
    rule: *const c_char, 
    index: c_ulong, 
    error: *mut *mut GError
) -> c_ulong