code: def process_empty_scalar(self, mark):
      return ScalarEvent(None, None, (True, False), "", mark, mark)
  
imports: from .error import MarkedYAMLError
  from .tokens import *
  from .events import *
  from .scanner import *
label_desc: Use image node_id 31 for calling the Parser obj's underlying member method code with example usage: obj.process_empty_scalar(mark) and returns: ScalarEvent