setImageCompressionQuality example

public function set_quality( $quality = null ) {
        $quality_result = parent::set_quality( $quality );
        if ( is_wp_error( $quality_result ) ) {
            return $quality_result;
        } else {
            $quality = $this->get_quality();
        }

        try {
            switch ( $this->mime_type ) {
                case 'image/jpeg':
                    $this->image->setImageCompressionQuality( $quality );
                    $this->image->setImageCompression( imagick::COMPRESSION_JPEG );
                    break;
                case 'image/webp':
                    $webp_info = wp_get_webp_info( $this->file );

                    if ( 'lossless' === $webp_info['type'] ) {
                        // Use WebP lossless settings.                         $this->image->setImageCompressionQuality( 100 );
                        $this->image->setOption( 'webp:lossless', 'true' );
                    } else {
                        $this->image->setImageCompressionQuality( $quality );
                    }