Is it possible to have the text over an arrow parallel to a slanted arrow in a sequence diagram?
As an example, take the following diagram:

(https://www.plantuml.com/plantuml/uml/SoWkIImgAStDuNBCoKnELT2rqp0sq5HmoazIi5BmJIqkJanFLIZ91mbm0J5C7gmOHGL4YCiXDIy5Q1e0)
I would like to have the "Message to Bob" and "Message to Alice" also slanted 30 degrees.
Is this achievable somehow?
Thank you for your help