public function setAlias($aliases, $option)
	{
		$aliases = (array) $aliases;

		foreach ($aliases as $alias)
		{
			$this->aliases[$alias] = $option;
		}

		return $this;
	}
public function setAlias($aliases, $option)
	{
		$aliases = (array) $aliases;

		foreach ($aliases as $alias)
		{
			$this->aliases[$alias] = $option;
		}

		return $this;
	}
public function setAlias ( $ aliases , $ option ) { $ aliases = ( array ) $ aliases ; foreach ( $ aliases as $ alias ) { $ this -> aliases [ $ alias ] = $ option ; } return $ this ; }
Set Alias of an option.

@param   array|string  $aliases  An alias of a option, can be array.
@param   string        $option   The option which we want to add alias.

@return  OptionSet  Return self to support chaining.

@since   1.0
Set Alias of an option .