export declare enum VariableSource {
    api = "api",
    dashboard = "dashboard",
    clientSDK = "clientSDK",
    serverSDK = "serverSDK"
}
/**
 * Variable model, defines the project-level variables used in SDKs to change functionality.
 */
export declare class Variable<IdType = string> {
    /**
     * Mongo primary _id.
     */
    _id: IdType;
    /**
     * Variable schema type
     */
    type: VariableType;
    /**
     * Unique key by Project. Used in the SDKs as the main reference for variables.
     * Must only contain lower-case characters and `_` or `-`.
     */
    key: string;
}
/**
 * Supported variable types
 */
export declare enum VariableType {
    string = "String",
    boolean = "Boolean",
    number = "Number",
    json = "JSON"
}
/**
 * Supported variable values
 */
type JSONValue = string | number | boolean | null | JSONObject | JSONArray;
type JSONObject = {
    [key: string]: JSONValue;
};
type JSONArray = JSONValue[];
export type DVCJSON = JSONObject;
export type DevCycleJSON = JSONObject;
export type VariableValue = string | boolean | number | DVCJSON;
type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends (k: infer I) => void ? I : never;
type IsUnion<T> = [T] extends [UnionToIntersection<T>] ? false : true;
export type VariableTypeAlias<T> = IsUnion<T> extends true ? T : T extends boolean ? boolean : T extends number ? number : T extends string ? string : T extends DVCJSON ? DVCJSON : never;
export {};