/**
 * @description Validates the format of an event name to ensure it follows the required pattern.
 * The expected pattern is `"contextName:EventName"`, where the event name must include a colon (`":"`)
 * to separate the context name and the event name.
 *
 * @param eventName The event name to validate. Must be a string containing a colon (`":"`).
 *
 * @throws {Error} Throws an error if the event name does not include a colon (`":"`).
 *
 * @example
 * ```typescript
 * validateContextEventName("user:created"); // Passes validation
 * validateContextEventName("invalidEventName"); // Throws an error
 * ```
 */
export default function validateContextEventName(eventName: string): void;
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