15   CurrentState = State::Preamble;  in visit()
21   if (CurrentState == State::Start)  in visit()
25   CurrentState = State::Preamble;  in visit()
30   CurrentState = State::Preamble;  in visit()
35   CurrentState = State::Preamble;  in visit()
41   if (CurrentState == State::Preamble)  in visit()
43   if (CurrentState == State::Function)  in visit()
45   CurrentState = State::Metadata;  in visit()
52   if (CurrentState == State::Function)  in visit()
54   CurrentState = State::Metadata;  in visit()
62   if (CurrentState == State::Metadata)  in visit()
64   CurrentState = State::CustomEvent;  in visit()
71   if (CurrentState == State::Metadata)  in visit()
73   CurrentState = State::CustomEvent;  in visit()
80   if (CurrentState == State::Metadata)  in visit()
82   CurrentState = State::CustomEvent;  in visit()
90   if (CurrentState == State::Metadata)  in visit()
92   CurrentState = State::Function;  in visit()
99   CurrentState = State::Arg;  in visit()
106     CurrentState = State::End;  in visit()