def get(self, key, failobj=None):
    try:
      cased_key = self.caseless_keys[key.lower()]
    except KeyError:
      return failobj
    return self.data[cased_key]
Filters a list of pages so that only those remain that are either:
dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/api/urlfetch.py/_CaselessDict.get--crossover with--dataset/ETHPy150Open feincms/feincms/feincms/templatetags/feincms_page_tags.py/siblings_along_path_to