writeln(string|array $messages, int $options = self::OUTPUT_NORMAL) Writes a message to the output

setErrorOutput(OutputInterface

setFormatter(

bool isQuiet() Returns whether verbosity is quiet (-q).

OutputInterface getErrorOutput()

class BufferedOutput extends Output

interface ConsoleOutputInterface implements

class NullOutput implements

OutputFormatterInterface

int getVerbosity() Gets the current verbosity of the output.