You can create context keys that relate to a flow action. For example, suppose you want to select a host from a table showing a list of Hosts. To get access to the selected Host you have to define a context element for use as a Flow Context for table rows. To do this, define the Selected Row built-in context as Host. Then you can use it to change pages to a view that requires Host as an input. See Additional Context to learn about adding more context elements to the flow.
The strict typing nature of the Web Component Framework disallows arbitrary casting of one type to another, since in any responsible UI development you need to detect and prevent incorrect input. ]
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