import { ImmutableArray } from "@tsplus/stdlib/collections/ImmutableArray/definition";
import { NonEmptyImmutableArray } from "@tsplus/stdlib/collections/NonEmptyImmutableArray/definition";
/**
 * Appends `a` to ImmutableArray<A>
 * @tsplus static ImmutableArray.Aspects append
 * @tsplus pipeable ImmutableArray append
 * @tsplus pipeable-operator ImmutableArray <
 * @tsplus location "@tsplus/stdlib/collections/ImmutableArray/append"
 */
export declare function append<A, B>(a: B): (self: ImmutableArray<A>) => NonEmptyImmutableArray<A | B>;
/**
 * @tsplus pipeable-operator ImmutableArray + 1.0
 * @tsplus location "@tsplus/stdlib/collections/ImmutableArray/append"
 */
export declare function appendOperator<A>(a: A): (self: ImmutableArray<A>) => NonEmptyImmutableArray<A>;
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