Hello Gayathri,
possibly, the following sections help you further:
Enumerate and search for existing Dialogs
Identify the active Dialogs and avoid race conditions
Concerning '... from other class ...', to test whether an object A contains some active dialog you need to access the object A. If you don't know object A, you can evaluate the entire view tree starting with the root object. See following section:
Enumerate and search views existing within the component
I hope it helps you.
Best regards
Paul Banach
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