public function getDafaultLogger () {
    if (null === $this->root) {
      $this->root = new HierarchialLogger(null);
    }
    return $this->root;
  }
public function getDafaultLogger () {
    if (null === $this->root) {
      $this->root = new HierarchialLogger(null);
    }
    return $this->root;
  }
public function getDafaultLogger ( ) { if ( null === $ this -> root ) { $ this -> root = new HierarchialLogger ( null ) ; } return $ this -> root ; }
Get the default logger.

Must return the same logger instance on each call.

@return LoggerInterface
Get the default logger .