pub fn getByIdentifierEnsureSupported(identifier: u16) !SupportedCodePage
pub fn getByIdentifierEnsureSupported(identifier: u16) !SupportedCodePage { const code_page = try getByIdentifier(identifier); return if (isSupported(code_page)) @fromBackingInt(@intCast(@backingInt(code_page))) else error.UnsupportedCodePage; }