Method setSubGroupsCollapsed

src/bases/TaskListView.ts:2336–2344

* Set collapsed state for all subgroups within a specific primary group, * without affecting the primary group itself.

(groupKey: string, collapsed: boolean)

	 * without affecting the primary group itself.
	 */
	private async setSubGroupsCollapsed(groupKey: string, collapsed: boolean): Promise<void> {
		for (const subGroupKey of this.currentSubGroupKeysByParent.get(groupKey) || []) {
			this.setSetEntry(this.collapsedSubGroups, subGroupKey, collapsed);
		}

		if (this.lastRenderWasGrouped) {
			await this.refreshGroupedView();
		}
	}

	/**
	 * Set collapsed state for all primary groups,