public function getLngs(): array
    {
        $lngs = [];

        foreach ($this->points as $point) {
            /** @var Coordinate $point */
            $lngs[] = $point->getLng();
        }

        return $lngs;
    }
public function getLngs(): array
    {
        $lngs = [];

        foreach ($this->points as $point) {
            
            $lngs[] = $point->getLng();
        }

        return $lngs;
    }
public function getLngs ( ) : array { $ lngs = [ ] ; foreach ( $ this -> points as $ point ) { /** @var Coordinate $point */ $ lngs [ ] = $ point -> getLng ( ) ; } return $ lngs ; }
Return all polygon point's longitudes.

@return float[]
Return all polygon point s longitudes .