/**
 * Convert an environment variable value to a boolean.
 */
/*@__NO_SIDE_EFFECTS__*/
export declare function envAsBoolean(value: any, defaultValue?: boolean): boolean;
/**
 * Convert an environment variable value to a number.
 */
/*@__NO_SIDE_EFFECTS__*/
export declare function envAsNumber(value: any, defaultValue?: number): number;
/**
 * Convert an environment variable value to a trimmed string.
 */
/*@__NO_SIDE_EFFECTS__*/
export declare function envAsString(value: any, defaultValue?: string): string;
