/**
 * Copyright (c) 2020-present, Goldman Sachs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { type Hashable } from '@finos/legend-shared';
import { type PackageableElementVisitor, PackageableElement } from '../PackageableElement.js';
import { Property } from './Property.js';
import type { DerivedProperty } from './DerivedProperty.js';
import type { AbstractProperty } from './AbstractProperty.js';
/**
 * Assocation needs exactly 2 properties (for 2 classes, not enumeration, not primitive), e.g.
 *    employees: Person[*]
 *    firm: Firm[1]
 * -> inside of Person, we will see a property firm: Firm[1] and vice versa
 *
 * NOTE: This is a very important note on the usage of `Association`. Association allows a very
 * nice trick that is without modifying some classes that you don't own, you can `create` property
 * on them by using association, but this can also be misused and accidentally create tangled cycles
 * of dependency between project. Imagine we create association between classes in project and system
 * or project dependencies. As such, in the app, we have to make it very clear that we prohibits this.
 *
 * TODO: We probably should change backend to do compilation check whether association refers
 * to a class from a different projects. Here, while building the graph, we can make use of the
 * root package to verify this in the UI and make this a validation error in a way.
 * See https://github.com/finos/legend-studio/issues/282
 */
export declare class Association extends PackageableElement implements Hashable {
    /**
     * To store the abstract properties generated while processing the milestoning properties. The properties
     * generated are `allVersions`, `allVersionsInRange` and derived property with date parameter.
     *
     * TODO: process new property added while editing the graph
     */
    _generatedMilestonedProperties: AbstractProperty[];
    properties: [Property, Property];
    derivedProperties: DerivedProperty[];
    constructor(name: string);
    /**
     * Make sure we clean up the properties added to classes through
     * this association
     *
     * @internal model logic
     */
    dispose(): void;
    protected get _elementHashCode(): string;
    accept_PackageableElementVisitor<T>(visitor: PackageableElementVisitor<T>): T;
}
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