/**
 * Get an environment variable with optional default value. Runtime agnostic.
 *
 * @param name The name of the environment variable.
 * @param defaultValue The default value to return if the environment variable is not set.
 * @returns The value of the environment variable, or the default value if the environment variable is not set.
 *
 */
export declare function getEnvVar(name: string, defaultValue?: string): string | undefined;
export declare function getNumberEnvVar(name: string, defaultValue?: number): number | undefined;