class_docstr: An OrderedSet is a custom MutableSet that remembers its order, so that
  every entry has an index that can be looked up.
  
  Example:
      >>> OrderedSet([1, 1, 2, 3, 2])
      OrderedSet([1, 2, 3])
class_docstr_tok: ["An","OrderedSet","is","a","custom","MutableSet","that","remembers","its","order",",","so","that","every","entry","has","an","index","that","can","be","looked","up",".","Example",":",">",">",">","OrderedSet","(","[","1",",","1",",","2",",","3",",","2","]",")","OrderedSet","(","[","1",",","2",",","3","]",")"]
docstr: Remove all items from this OrderedSet.
docstr_tok: ["Remove","all","items","from","this","OrderedSet","."]
code: def clear(self):
      """
      Remove all items from this OrderedSet.
      """
      del self.items[:]
      self.map.clear()
  
imports: import itertools
  from collections import deque
label_desc: Use image node_id 13 for calling the OrderedSet obj's underlying member method code with example usage: obj.clear() without return types