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36d9f7bc5e
Currently the 'permissionCallback' object is only available at the Verto instance level. This is problematic in multi-call scenarios, where an individual call dialog needs access to the onGranted/onDenied callback functions. The patch adds a check for existence of onGranted/onDenied callback functions at the dialog level, with a fallback to the original behavior of calling onGranted/onDenied from the Verto instance if it's not available on the dialog. This preserves backwards compatibility while allowing per-dialog overrides going forward.