16   CurrentState = State::Preamble;  in visit()
22   if (CurrentState == State::Start)  in visit()
26   CurrentState = State::Preamble;  in visit()
31   CurrentState = State::Preamble;  in visit()
36   CurrentState = State::Preamble;  in visit()
42   if (CurrentState == State::Preamble)  in visit()
44   if (CurrentState == State::Function)  in visit()
46   CurrentState = State::Metadata;  in visit()
53   if (CurrentState == State::Function)  in visit()
55   CurrentState = State::Metadata;  in visit()
63   if (CurrentState == State::Metadata)  in visit()
65   CurrentState = State::CustomEvent;  in visit()
72   if (CurrentState == State::Metadata)  in visit()
74   CurrentState = State::CustomEvent;  in visit()
81   if (CurrentState == State::Metadata)  in visit()
83   CurrentState = State::CustomEvent;  in visit()
91   if (CurrentState == State::Metadata)  in visit()
93   CurrentState = State::Function;  in visit()
100   CurrentState = State::Arg;  in visit()
107     CurrentState = State::End;  in visit()