class_docstr: FastMachine is a deterministic machine represented in a way that
  allows fast scanning.
code: def range_to_string(self, range_tuple):
      (c1, c2) = range_tuple
      if c1 == c2:
          return repr(c1)
      else:
          return "%s..%s" % (repr(c1), repr(c2))
  
imports: from __future__ import absolute_import
  import sys
  from .Transitions import TransitionMap
label_desc: Use image node_id 12 for calling the FastMachine obj's underlying member method code with example usage: obj.range_to_string(range_tuple) and returns: repr, unknown