AlsoExtension<T extends Object> extension

Extension for executing side effects while returning the original value.

This extension provides a convenient way to perform operations (like logging or validation) without transforming the value. The block executes as a side effect, and the original value is always returned.

Common use cases:

• Logging intermediate values in a chain
• Validation checks
• Debugging value transformations
• Side effects in fluent APIs

Example:

final user = fetchUser()
  .also((u) => print('Fetched: ${u.name}'))
  .also((u) => analytics.track('user_loaded'));