Function webkit2gtk_sys::webkit_network_proxy_settings_add_proxy_for_scheme

pub unsafe extern "C" fn webkit_network_proxy_settings_add_proxy_for_scheme(
    proxy_settings: *mut WebKitNetworkProxySettings,
    scheme: *const c_char,
    proxy_uri: *const c_char
)

Available on crate feature v2_16 only.