public function delete($key) : Blob
    {
        if ($this->offsetExists($key)) {
            $this->offsetUnset($key);
        }

        return $this;
    }
public function delete($key) : Blob
    {
        if ($this->offsetExists($key)) {
            $this->offsetUnset($key);
        }

        return $this;
    }
public function delete ( $ key ) : Blob { if ( $ this -> offsetExists ( $ key ) ) { $ this -> offsetUnset ( $ key ) ; } return $ this ; }
Delete value for key in Blob.

@param  mixed $key Key to delete.
@return Blob  Blob object for optional chaining.
Delete value for key in Blob .