class_docstr: Infer symbolic type for all AST node. 
class_docstr_tok: ["Infer","symbolic","type","for","all","AST","node","."]
code: def combined(self, *types):
      all_types = ordered_set()
      for ty in types:
          if isinstance(ty, self.builder.CombinedTypes):
              all_types.extend(ty.types)
          elif ty is not self.builder.UnknownType:
              all_types.append(ty)
  
      if len(all_types) == 0:
          return self.builder.UnknownType
      elif len(all_types) == 1:
          return next(iter(all_types))
      else:
          return self.builder.CombinedTypes(*all_types)
  
imports: from pythran.analyses import LazynessAnalysis, StrictAliases, YieldPoints
  from pythran.analyses import LocalNodeDeclarations, Immediates, RangeValues
  from pythran.analyses import Ancestors
  from pythran.config import cfg
  from pythran.cxxtypes import TypeBuilder, ordered_set
  from pythran.intrinsic import UserFunction, Class
  from pythran.passmanager import ModuleAnalysis
  from pythran.tables import operator_to_lambda, MODULES
  from pythran.types.conversion import pytype_to_ctype
  from pythran.types.reorder import Reorder
  from pythran.utils import attr_to_path, cxxid, isnum, isextslice
  from collections import defaultdict
  from functools import reduce
  import gast
  from itertools import islice
  from copy import deepcopy
label_desc: Use image node_id 2 for calling the Types obj's underlying member method code with example usage: obj.combined() and returns: self, next, self