import {
  IRunArgs,
  OccurrenceGenerator,
  OccurrenceGeneratorRunResult,
  Operator,
  OperatorFnOutput,
} from '../occurrence-generator';
/**
 * An operator function which accepts a spread of occurrence generators
 * and removes their occurrences from the output.
 *
 * @param streams a spread of occurrence generators
 */
export declare function subtract(
  ...streams: OccurrenceGenerator[]
): OperatorFnOutput;
export declare class SubtractOperator extends Operator {
  /** Not actually used but necessary for IRunnable interface */
  set(_: 'timezone', value: string | null): SubtractOperator;
  _run(args?: IRunArgs): OccurrenceGeneratorRunResult;
  protected calculateIsInfinite(): boolean;
  protected calculateHasDuration(): boolean;
}