docs: def siblings(self, as_resources=False):
  
  		'''
  		method to return hierarchical siblings of this resource.
  
  		Args:
  			as_resources (bool): if True, opens each as appropriate resource type instead of return URI only
  
  		Returns:
  			(list): list of resources
  		'''
  
  		siblings = set()
  
  		# loop through parents and get children
  		for parent in self.parents(as_resources=True):
  			for sibling in parent.children(as_resources=as_resources):
  				siblings.add(sibling)
  
  		# remove self
  		if as_resources:
  			siblings.remove(self)
  		if not as_resources:
  			siblings.remove(self.uri)
  
  		return list(siblings)