src/ImboClient/Http/ImageUrl.php
public function thumbnail($width = 50, $height = 50, $fit = 'outbound') {
        return $this->addTransformation(
            sprintf('thumbnail:width=%d,height=%s,fit=%s', (int) $width, (int) $height, $fit)
        );
    }
public function thumbnail($width = 50, $height = 50, $fit = 'outbound') {
        return $this->addTransformation(
            sprintf('thumbnail:width=%d,height=%s,fit=%s', (int) $width, (int) $height, $fit)
        );
    }
public function thumbnail ( $ width = 50 , $ height = 50 , $ fit = 'outbound' ) { return $ this -> addTransformation ( sprintf ( 'thumbnail:width=%d,height=%s,fit=%s' , ( int ) $ width , ( int ) $ height , $ fit ) ) ; }
Add a thumbnail transformation

@param int $width Width of the thumbnail
@param int $height Height of the thumbnail
@param string $fit Fit type. 'outbound' or 'inset'
@return self
Add a thumbnail transformation