code: def peek_event(self):
      # Get the next event.
      if self.current_event is None:
          if self.state:
              self.current_event = self.state()
      return self.current_event
  
imports: from .error import MarkedYAMLError
  from .tokens import *
  from .events import *
  from .scanner import *
label_desc: Use image node_id 4 for calling the Parser obj's underlying member method code with example usage: obj.peek_event() and returns: self