protected static function is_narrow_space( $string ) {
		return U::THIN_SPACE === $string || U::HAIR_SPACE === $string || U::NO_BREAK_NARROW_SPACE === $string;
	}
protected static function is_narrow_space( $string ) {
		return U::THIN_SPACE === $string || U::HAIR_SPACE === $string || U::NO_BREAK_NARROW_SPACE === $string;
	}
protected static function is_narrow_space ( $ string ) { return U :: THIN_SPACE === $ string || U :: HAIR_SPACE === $ string || U :: NO_BREAK_NARROW_SPACE === $ string ; }
Is the given string one of the narrow space characters?

@since 6.0.0

@param  string $string The whitespace to test.

@return bool
Is the given string one of the narrow space characters?