prettyPreAcc pp alvl wrap (PairArrays acc1 acc2)
  = wrap $ sep [pp alvl parens acc1, pp alvl parens acc2]
prettyPreAcc pp alvl wrap (PairArrays acc1 acc2)
  = wrap $ sep [pp alvl parens acc1, pp alvl parens acc2]
prettyPreAcc pp alvl wrap (PairArrays acc1 acc2)
  = wrap $ sep [pp alvl parens acc1, pp alvl parens acc2]