code: def draw(self):
      (right, bottom) = DrsDrawer(self._drs, canvas=self._canvas).draw()
      self.bbox = (0, 0, right + 1, bottom + 1)
  
imports: from nltk.parse import MaltParser
  from nltk.sem.drt import DrsDrawer, DrtVariableExpression
  from nltk.sem.glue import DrtGlue
  from nltk.sem.logic import Variable
  from nltk.tag import RegexpTagger
  from nltk.util import in_idle
label_desc: Use image node_id 2 for calling the DrsWidget obj's underlying member method code with example usage: obj.draw() without return types