is StageFailure.AssignmentErrors -> {
                    appendLine("Failures in assignments:".indent(1))
                    stageFailure.usages.forEach { unassigned ->
                        appendLine(describedUnassignedValueUsage(unassigned).indent(2))
                    }
                }

                is StageFailure.DocumentCheckFailures -> {
                    appendLine("Failures in document checks:".indent(1))