How to get model bounding box

Hi all, I'm using gazebo for robotic experiments in combination with ROS. My problem is the following: given the name of a certain model in the scene (published on a topic) I need to write a ROS node that is capable of determining the bounding box of the model. I'm searching among the various services that gazebo exposes to ROS and I came across [this](http://docs.ros.org/kinetic/api/gazebo_msgs/html/srv/GetModelProperties.html). But I don't know how to extract the required information from this message. Please, can someone tell me how this can be done? Thanks.