/**
* Retrieves the API Gateway base URL from the Function's environment.
*
* This function is intended to be used only from within a function. Usage of this utility elsewhere may result
* in errors since the environment may not be properly configured.
*
* @returns The API Gateway base URL (e.g., "https://example.palantirfoundry.com")
* @throws Error if the API Gateway base URL has not been properly configured in the function's environment.
*
* @example
* ```typescript
* const baseUrl = getApiGatewayBaseUrl();
* // Returns: "https://example.palantirfoundry.com"
* ```
*/
export declare function getApiGatewayBaseUrl(): string;