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Markdown

**STRUCT**
# `UpdateObserver`
A widget which executes a custom code when being updated.
## Properties
### `onUpdate`
The function.
### `content`
The content.
## Methods
### `container(modifiers:)`
Get the content's container.
- Parameter modifiers: Modify views before being updated.
- Returns: The content's container.
### `update(_:modifiers:)`
Update the content.
- Parameters:
- storage: The content's storage.
- modifiers: Modify views before being updated.