mtaran-google

import {Action} from '@ngrx/store';  // from //third_party/javascript/ngrx:ngrx_store
import {OperatorFunction} from 'rxjs';
import {filter} from 'rxjs/operators';

// Removes types from T that are not assignable to U.
export type Filter<T, U> = T extends U ? T : never;

/**
 * Equivalent to the `ofType` operator provided by @ngrx/effects, but with
 * smarter type inference.