(require mzlib/for)

The mzlib/for library re-exports from scheme/base:

  for/fold for*/fold
  for for*
  for/list for*/list
  for/lists for*/lists
  for/and for*/and
  for/or for*/or
  for/first for*/first
  for/last for*/last
  
  for/fold/derived for*/fold/derived
  
  in-range
  in-naturals
  in-list
  in-vector
  in-string
  in-bytes
  in-input-port-bytes
  in-input-port-chars
  in-hash-table
  in-hash-table-keys
  in-hash-table-values
  in-hash-table-pairs
  
  in-parallel
  stop-before
  stop-after
  in-indexed
  
  sequence?
  sequence-generate
  
  define-sequence-syntax
  make-do-sequence
  :do-in