def is: SpecStructure =
    "ChunkSpec".title ^
      s2"""
  chunk apply $apply
  chunk length $length
  chunk equality prop $equality
  chunk inequality $inequality
  flatMap chunk $flatMap
  map chunk $map
  materialize chunk $materialize
  foldLeft chunk $foldLeft
  filter chunk $filter
  drop chunk $drop
  take chunk $take
  dropWhile chunk $dropWhile
  takeWhile chunk $takeWhile
  toArray $toArray
  foreach $foreach
  concat chunk $concat
  An Array-based chunk that is filtered empty and mapped must not throw NPEs. $nullArrayBug
  toArray on concat of a slice must work properly. $toArrayOnConcatOfSlice
  toArray on concat of empty and integers must work properly. $toArrayOnConcatOfEmptyAndInts
  Chunk.filter that results in an empty Chunk must use Chunk.empty $filterConstFalseResultsInEmptyChunk
    """