public function &bool( $name, $value = null, $usage = '' ) {
		return $this->_storeFlag(self::TYPE_BOOL, $name, $value, $usage);
	}
public function &bool( $name, $value = null, $usage = '' ) {
		return $this->_storeFlag(self::TYPE_BOOL, $name, $value, $usage);
	}
public function & bool ( $ name , $ value = null , $ usage = '' ) { return $ this -> _storeFlag ( self :: TYPE_BOOL , $ name , $ value , $ usage ) ; }
Defines a bool long-flag of specified name, default value, and usage string.
The return value is a reference to a variable that stores the value of the flag.

Examples:

Truth-y:

--mybool=[true|t|1]
--mybool [true|t|1]
--mybool

False-y:

--mybool=[false|f|0]
--mybool [false|f|0]
[not calling --mybool and having the default false]

@param string $name The name of the long-flag to define
@param mixed  $value The default value - usually false for bool - which if null marks the flag required
@param string $usage The usage description
@return mixed A reference to the flags value
Defines a bool long - flag of specified name default value and usage string . The return value is a reference to a variable that stores the value of the flag .