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