Gets all levels of subcategories of some wiki category (that means subcategories, sub-subcategories, and so on) and fills this PageList with titles of all pages, found in all levels of subcategories. The multiplicates of recurring pages are removed. Subcategory pages are excluded from resultant list, call FillAllFromCategoryTree(String) function instead to get PageList with subcategories on board. This operation may be very time-consuming and traffic-consuming. The function clears the PageList before filling begins.

public void FillFromCategoryTree(
	string categoryName
)