/**
 * useful for checking if an object, string, or array is empty,
 * undefined, or null
 */
export declare function isEmpty(obj: any): boolean;
/**
 * Much the same as isEmpty but ignore blank properties
 *
 * { hello: undefined } => both isEmpty and isPracticallyEmpty return true
 * { hello: '' } => isEmpty returns false, isPracticallyEmpty returns true
 * { hello: ' ' } => isEmpty returns false, isPracticallyEmpty returns true
 */
export declare function isPracticallyEmpty(obj: any): boolean;
/**
 * useful for checking if an object, string, or array is empty,
 * undefined, or null
 */
export declare function isNotEmpty<T>(obj: T): obj is Exclude<T, undefined | null>;
/**
 * useful for checking if an object, string, or array is empty,
 * undefined, or null
 */
export declare function isNotPracticallyEmpty<T>(obj: T): obj is Exclude<T, undefined | null>;