The thumbnail object defines the visualization of a selected analysis step in the analysis path display of the UI. It has the following format:
{ "type" : "thumbnail", // optional "leftUpper" : <label>, "leftLower" : <label>, "rightUpper" : <label>, "rightLower" : <label> }
The labels define the text that is displayed in the four corners of the thumbnail. All properties of the thumbnail object are optional.