code: def parse_flow_sequence_first_entry(self):
      token = self.get_token()
      self.marks.append(token.start_mark)
      return self.parse_flow_sequence_entry(first=True)
  
imports: from .error import MarkedYAMLError
  from .tokens import *
  from .events import *
  from .scanner import *
label_desc: Use image node_id 22 for calling the Parser obj's underlying member method code with example usage: obj.parse_flow_sequence_first_entry() and returns: self