UML Diagrams
Source code location for diagrams
https://github.com/OPM/ResInsight/tree/dev/doc
PlantUML
Class and sequence diagrams are created using the PlantUml text file format
https://plantuml.com/
Use Visual Studio Code
Use Visual Studio Code to see the diagrams
https://marketplace.visualstudio.com/items?itemName=jebbs.plantuml