import { GroupStep, Pipeline, StepBuilder, StepSchema } from '../lib';
export interface FindStepsPredicate {
    (step: StepSchema | StepBuilder, index: number, steps: Array<StepSchema | StepBuilder>): boolean;
}
export interface FindStepsNarrowPredicate<S extends StepSchema | StepBuilder> {
    (step: StepSchema | StepBuilder, index: number, steps: Array<StepSchema | StepBuilder>): step is S;
}
export interface FindStepsOptions {
    /**
     * Whether to search recursively within GroupSteps
     */
    recursive?: boolean | undefined;
}
/**
 * Finds all the steps that match the predicate within a pipeline, group, or
 * iterable of steps
 */
export declare function findSteps<S extends StepSchema | StepBuilder>(pipelineGroupOrSteps: Pipeline | GroupStep | Iterable<StepSchema | StepBuilder>, predicate: FindStepsNarrowPredicate<S>, options?: FindStepsOptions): ReadonlyArray<S>;
export declare function findSteps(pipelineGroupOrSteps: Pipeline | GroupStep | Iterable<StepSchema | StepBuilder>, predicate: FindStepsPredicate, options?: FindStepsOptions): ReadonlyArray<StepSchema | StepBuilder>;
/**
 * Finds the first step that matches the predicate within a pipeline, group, or
 * iterable of steps
 */
export declare function findFirstStep<S extends StepSchema | StepBuilder>(pipelineGroupOrSteps: Pipeline | GroupStep | Iterable<StepSchema | StepBuilder>, predicate: FindStepsNarrowPredicate<S>, options?: FindStepsOptions): S | undefined;
export declare function findFirstStep(pipelineGroupOrSteps: Pipeline | GroupStep | Iterable<StepSchema | StepBuilder>, predicate: FindStepsPredicate, options?: FindStepsOptions): StepSchema | StepBuilder | undefined;