class_docstr: A data structure to represent a parse tree
class_docstr_tok: ["A","data","structure","to","represent","a","parse","tree"]
docstr: Walks over all of the trees and gets all of the unique constituent names from the trees
docstr_tok: ["Walks","over","all","of","the","trees","and","gets","all","of","the","unique","constituent","names","from","the","trees"]
code: def get_unique_constituent_labels(trees):
      """
      Walks over all of the trees and gets all of the unique constituent names from the trees
      """
      constituents = Tree.get_constituent_counts(trees)
      return sorted(set(constituents.keys()))
  
imports: from collections import deque, Counter
  from enum import Enum
  from io import StringIO
  import itertools
  import re
  import warnings
  from stanza.models.common.stanza_object import StanzaObject
label_desc: Use image node_id 14 for calling the Tree obj's underlying member method code with example usage: obj.get_unique_constituent_labels(trees) and returns: sorted