public static To a <From, To>( this Config.Parser <From, To> p, Config.ParserInput <From> input ) => p(input.path, input.node).rightOrThrow;
public static Either <ConfigLookupError, To> aE <From, To>( this Config.Parser <From, To> p, Config.ParserInput <From> input ) => p(input.path, input.node);