seq6<R1, R2, R3, R4, R5, R6>  function 
 
Creates a Parser that consumes the 6 parsers passed as argument in sequence and returns a Record with the 6 positional parse results.
For example,
the parser seq6(char('a'), char('b'), char('c'), char('d'), char('e'), char('f'))
returns ('a', 'b', 'c', 'd', 'e', 'f')
for the input 'abcdef'.
Implementation
@useResult
Parser<(R1, R2, R3, R4, R5, R6)> seq6<R1, R2, R3, R4, R5, R6>(
  Parser<R1> parser1,
  Parser<R2> parser2,
  Parser<R3> parser3,
  Parser<R4> parser4,
  Parser<R5> parser5,
  Parser<R6> parser6,
) => SequenceParser6<R1, R2, R3, R4, R5, R6>(
  parser1,
  parser2,
  parser3,
  parser4,
  parser5,
  parser6,
);