code: def expect_flow_mapping_simple_value(self):
      self.write_indicator(":", False)
      self.states.append(self.expect_flow_mapping_key)
      self.expect_node(mapping=True)
  
imports: from .error import YAMLError
  from .events import *
label_desc: Use image node_id 22 for calling the Emitter obj's underlying member method code with example usage: obj.expect_flow_mapping_simple_value() without return types