/**
 * Checks if a given value is considered valid based on its type.
 *
 * @returns A boolean indicating whether the value is valid.
 *
 * The validation rules are as follows:
 * - `null` or `undefined` values are considered invalid.
 * - Strings are valid if they are not empty after trimming whitespace.
 * - Booleans are valid only if they are `true`.
 * - Numbers are valid if they are non-negative.
 * - Objects are valid if they have at least one property.
 * - All other types are considered valid by default.
 * @param values
 */
export declare function isValid(...values: any[]): boolean;
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