function tokenizeContainer(effects, ok, nok) {
  // Always populated by defaults.
  assert(
    this.parser.constructs.disable.null,
    'expected `disable.null` to be populated'
  )
  return factorySpace(
    effects,
    effects.attempt(this.parser.constructs.document, ok, nok),
    types.linePrefix,
    this.parser.constructs.disable.null.includes('codeIndented')
      ? undefined
      : constants.tabSize
  )
}
@this {TokenizeContext}
  Context.
@type {Tokenizer}
  Tokenizer.