original_string: public function alias($alias, $path = null)
  	{
  		if (is_null($path))
  		{
  			return $this->aliases[$alias] ?: null;
  		}
  		else
  		{
  			$this->aliases[$alias] = $path;
  		}
  	}
code: public function alias($alias, $path = null)
  	{
  		if (is_null($path))
  		{
  			return $this->aliases[$alias] ?: null;
  		}
  		else
  		{
  			$this->aliases[$alias] = $path;
  		}
  	}
code_tokens: public function alias ( $ alias , $ path = null ) { if ( is_null ( $ path ) ) { return $ this -> aliases [ $ alias ] ? : null ; } else { $ this -> aliases [ $ alias ] = $ path ; } }
docstring: Set or get a config alias
  
  @param string $alias
  @param string $path
  @return string|null
docstring_tokens: Set or get a config alias