/**
 * The base class for all SDKs.
 */
export declare class BaseSDK {
    /**
     * The slug of the entity to query.
     */
    slug: string;
    /**
     * A flag to determine if the entity is a single entity or a collection.
     */
    isSingleEntity: boolean;
    /**
     * The query parameters of the request.
     */
    queryParams: {
        [key: string]: string;
    };
    /**
     * Set the slug of the entity to query.
     *
     * @param slug The slug of the entity to query.
     *
     * @returns The current instance of the client.
     * @example client.from('cats').find();
     */
    from(slug: string): this;
    /**
     *
     * Adds a where clause to the query.
     *
     * @param whereClause The where clause to add.
     *
     * @returns The current instance of the client.
     * @example client.from('cats').where('age = 10').find();
     */
    where(whereClause: string): this;
    /**
     * Adds a where clause to the query.
     *
     * @param whereClause
     * @returns The current instance of the client.
     * @example client.from('cats').andWhere('age = 10').find();
     */
    andWhere(whereClause: string): this;
    /**
     * Adds an order by clause to the query.
     *
     * @param propName The property name to order by.
     * @param order The order of the property (ASC or DESC). Default ASC
     *
     * @returns The current instance of the client.
     * @example client.from('cats').orderBy('age', { desc: true }).find();
     */
    orderBy(propName: string, order?: {
        desc: boolean;
    }): this;
    /**
     * Loads the relations of the entity.
     *
     * @param relations The relations to load.
     *
     * @returns The current instance of the client.
     * @example client.from('cats').with(['owner', 'owner.company']).find();
     */
    with(relations: string[]): this;
}