src/vs/workbench/contrib/debug/browser/debugViewlet.ts/DebugViewPaneContainer/addPanes
class DebugViewPaneContainer:	override addPanes(panes: { pane: ViewPane; size: number; index?: number }[]): void {
		super.addPanes(panes);

		for (const { pane: pane } of panes) {
			// attach event listener to
			if (pane.id === BREAKPOINTS_VIEW_ID) {
				this.breakpointView = pane;
				this.updateBreakpointsMaxSize();
			} else {
				this.paneListeners.set(pane.id, pane.onDidChange(() => this.updateBreakpointsMaxSize()));
			}
		}
	}