Hey there, sorry for my late response.
You have a full description of the get_image
method:
/**
* Categories_Multiple_Images::get_image()
* Returns the image(s)
* @param mixed $term_id Term ID
* @param mixed $image_number Specific Image Number
* @param string $size Image Size [thumb, full etc…]
* @param bool $return_placeholder Use image placeholder incase no image was found
* @return
*/
Maybe I expected people to look inside the code and should put it in the documentation.