Solution: Standardize File Storage Clients

Solution explanation

• Lines 2–19: We define two incompatible clients:

  • localFs uses save() and read() for file operations.

  • s3Client uses uploadFile() and getFile().

• Lines 22–24: The StorageAdapter constructor accepts any client instance.

  • It stores a reference to the wrapped client.

  • This enables the adapter to forward calls dynamically.

• Lines 26–31: The .upload() method unifies upload behavior.

  • If ...