Make default size and position of dap-ui buffers (sessions, locals, breakpoints,...) configurable

[ecky-l]

When I am in debug mode and open one of the auxiliary windows, like with dap-ui-locals (from the dap-hydra), the window does always open with a predefined size that is way too small for my setup. I know how to change this, but it means to always perform 5 steps:

1. change into the buffer with the code being debugged
2. close dap-hydra by pressing "q"
3. change into the locals buffer
4. press "w" and change the window size
5. change into the code buffer and open dap-hydra again

Since I regularly open the auxiliary windows only when I need them, this is quite a hassle. So I was searching for a way to configure the default window sizes (and positions), but could not find one. The only thing I could find was a variable definition in dap-ui.el that reads

(defvar dap-ui-buffer-configurations
  `((,dap-ui--locals-buffer . ((side . right) (slot . 1) (window-width . 0.20)))
    (,dap-ui--expressions-buffer . ((side . right) (slot . 2) (window-width . 0.20)))
    (,dap-ui--sessions-buffer . ((side . right) (slot . 3) (window-width . 0.20)))
    (,dap-ui--breakpoints-buffer . ((side . left) (slot . 2) (window-width . ,treemacs-width)))
    (,dap-ui--debug-window-buffer . ((side . bottom) (slot . 3) (window-width . 0.20)))
    (,dap-ui--repl-buffer . ((side . bottom) (slot . 1) (window-height . 0.45)))))

But I was unsuccessful in copying and modifying this code into my init.el (need to mention btw., I am not an Emacs Lisp expert).

A documented way to change the default sizes/positions does apparently not exist. Would it be possible to make these parameters configurable, please?