code: def opt_separator(self) -> bool:
          
          start = self.offset
          self.dfa([
              {  # state 0: whitespace
                  "": lambda: -1,
                  " ": lambda: 0,
                  "\t": lambda: 0,
                  "\n": lambda: 0,
                  "\r": lambda: 1,
                  "/": lambda: 2
              },
              {  # state 1: CR/LF?
                  "": self._back_break,
                  "\n": lambda: 0
              },
              {  # state 2: start comment?
                  "": self._back_break,
                  "/": lambda: 3,
                  "*": lambda: 4
              },
              {  # state 3: line comment
                  "": lambda: 3,
                  "\n": lambda: 0
              },
              {  # state 4: block comment
                  "": lambda: 4,
                  "*": lambda: 5
              },
              {  # state 5: end block comment?
                  "": lambda: 4,
                  "/": lambda: 0,
                  "*": lambda: 5
              }])
          return start < self.offset
docs: Parse an optional separator and return ``True`` if found.
  
          Raises:
              EndOfInput: If past the end of input.