code: def ValueErrorOnFalse(ok, *args):
      """Returns None / arg / (args,...) if ok."""
      if not isinstance(ok, bool):
          raise TypeError(
              "Use ValueErrorOnFalse only on bool return value"
          )
      if not ok:
          raise ValueError("CLIF wrapped call returned False")
      # Plain return args will turn 1 into (1,)  and None into () which is unwanted.
      if args:
          return args if len(args) > 1 else args[0]
      return None
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import abc
  import six
  from third_party.nucleus.protos import bed_pb2
  from third_party.nucleus.protos import bedgraph_pb2
  from third_party.nucleus.protos import fastq_pb2
  from third_party.nucleus.protos import gff_pb2
  from third_party.nucleus.protos import reads_pb2
  from third_party.nucleus.protos import variants_pb2
label_desc: Use image node_id 1 for calling a global function with example usage: ValueErrorOnFalse(ok) and returns: None, unknown