### children
- type: ReactNode
- description: Accepts `<ComposerHeader.Actions/>` and `<ComposerHeader.MainActions/>` elements. Any other child isn't rendered.
### dataHook
- type: string
- description: Applies a data-hook HTML attribute to be used in the tests.
### backButtonValue
- type: ReactNode
- description: Defines the label of a back button.
### onBackClick
- type: MouseEventHandler
- description: Defines what happens when the back button is clicked.
### size
- type: "small" | "medium"
- description: Sets the height of the component and adjusts the size of the back button.
### dropShadow
- type: boolean
- description: Applies a drop shadow effect.