Function register

src/function_registry.ts:37–50

(
  functionName: string,
  signatureType: SignatureType,
  userFunction: HandlerFunction<T>,
)

 * Helper method to store a registered function in the registration container
 */
const register = <T = unknown, U = unknown>(
  functionName: string,
  signatureType: SignatureType,
  userFunction: HandlerFunction<T>,
): void => {
  if (!isValidFunctionName(functionName)) {
    throw new Error(`Invalid function name: ${functionName}`);
  }

  registrationContainer.set(functionName, {
    signatureType,
    userFunction,
  });
};

/**
 * Returns true if the function name is valid