/**
 * Base class for all Value Objects in the domain
 * Value Objects are immutable and compared by value, not identity
 */
export declare abstract class ValueObject {
    /**
     * Abstract method to get all properties for equality comparison
     * Subclasses must implement this to return all properties that define equality
     */
    protected abstract getEqualityProperties(): any[];
    /**
     * Check equality with another Value Object
     * Two Value Objects are equal if they have the same values for all properties
     */
    equals(other: ValueObject): boolean;
    /**
     * Get string representation for debugging
     */
    toString(): string;
}
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