pub trait CssProviderExt: IsA<CssProvider> + Sealed + 'static {
// Provided methods
fn load_from_data(&self, data: &[u8]) -> Result<(), Error> { ... }
fn load_from_file(&self, file: &impl IsA<File>) -> Result<(), Error> { ... }
fn load_from_path(&self, path: &str) -> Result<(), Error> { ... }
fn load_from_resource(&self, resource_path: &str) { ... }
fn to_str(&self) -> GString { ... }
fn connect_parsing_error<F: Fn(&Self, &CssSection, &Error) + 'static>(
&self,
f: F
) -> SignalHandlerId { ... }
}