export declare function deepClone<T>(obj: T): T;
export declare function deepFreeze<T>(obj: T): T;
export declare function cloneAndChange(obj: any, changer: (orig: any) => any): any;
/**
 * Copies all properties of source into destination. The optional parameter "overwrite" allows to control
 * if existing properties on the destination should be overwritten or not. Defaults to true (overwrite).
 */
export declare function mixin(destination: any, source: any, overwrite?: boolean): any;
export declare function objectEquals(one: any, other: any): boolean;
/**
 * Calls `JSON.Stringify` with a replacer to break apart any circular references.
 * This prevents `JSON`.stringify` from throwing the exception
 *  "Uncaught TypeError: Converting circular structure to JSON"
 */
export declare function safeStringify(obj: any): string;
export declare function getOrDefault<T, R>(obj: T, fn: (obj: T) => R | undefined, defaultValue: R): R;
type obj = Record<string, any>;
/**
 * Returns an object that has keys for each value that is different in the base object. Keys
 * that do not exist in the target but in the base object are not considered.
 *
 * Note: This is not a deep-diffing method, so the values are strictly taken into the resulting
 * object if they differ.
 *
 * @param base the object to diff against
 * @param obj the object to use for diffing
 */
export declare function distinct(base: obj, target: obj): obj;
export declare function getCaseInsensitive(target: obj, key: string): any;
export declare function notEmpty<T>(arg: T | undefined | null): arg is T;
/**
 * `true` if the argument is an empty object. Otherwise, `false`.
 */
export declare function isEmpty(arg: Record<any, any>): boolean;
export {};
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