gen-jhipster/dist/generators/type-utils.js

VHipster - Spring Boot + Angular/React/Vue in one handy generator

function deepFreeze(obj) {
    if (obj && typeof obj === 'object' && !Object.isFrozen(obj)) {
        Object.keys(obj).forEach(key => {
            deepFreeze(obj[key]);
        });
        Object.freeze(obj);
    }
    return obj;
}
/**
 * Type inferring function to create a JHipster command definition.
 * Freezes the object to prevent further modifications.
 */
export const asCommand = (command) => deepFreeze(command);