class_docstr: Class containing a list of trios, with extra functionality.
  
  :param trios: list of trio objects to include in pedigree
  :type trios: list of :class:`.Trio`
docstr: List of trio objects that have a defined father and mother.
  
  :rtype: list of :class:`.Trio`
docstr_tok: ["List","of","trio","objects","that","have","a","defined","father","and","mother",".",":","rtype",":","list","of",":","class",":","`",".Trio","`"]
code: def complete_trios(self):
      """List of trio objects that have a defined father and mother.
  
      :rtype: list of :class:`.Trio`
      """
      return list(filter(lambda t: t.is_complete(), self.trios))
  
imports: import re
  from collections import Counter
  from hail.typecheck import typecheck_method, nullable, sequenceof
  from hail.utils.java import Env, FatalError, warning
label_desc: Use image node_id 7 for calling the Pedigree obj's underlying member method code with example usage: obj.complete_trios() and returns: list