class_docstr: beam with text, optical and textual score
code: def getNextChars(self):
      return self.lm.getNextChars(self.textual.wordDev)
  
imports: from __future__ import division
  from __future__ import print_function
  import copy
label_desc: Use image node_id 8 for calling the Beam obj's underlying member method code with example usage: obj.getNextChars() and returns: self