PII Masking Module for Customer Export

A third-party compliance reporting platform requires customer records before dispatching quarterly regulatory reports. Before any data leaves your Mule application, all personally identifiable information must be masked: email addresses, phone numbers, and bank account numbers. This challenge teaches you how to build a reusable utils::Masking custom DataWeave module, implement three masking functions inside it, and apply them safely during array iteration — including null-safe handling for optio