The «module» backend_managers contains various classes:
ToolTriggerEvent
ToolManagerMessageEvent
ToolManager
Matplotlib is a Python 2D plotting library which produces publication-quality figures in a variety of hardcopy formats and interactive environments across platforms. Matplotlib can be used in Python scripts, the Python and IPython shell (à la MATLAB or Mathematica), web application servers, and various graphical user interface toolkits.
Modules being visualised
List of repository modules/files being visualised in the above diagram: