"Private members is unused" does not understand VB's Handles pattern

[davkean]

Repro steps

        Private Sub Cancel_Click(sender As Object, e As EventArgs) Handles Cancel.Click
            _loadAnonymous = True
            DialogResult = DialogResult.OK
        End Sub

Expected behavior

No message

Actual behavior

Severity	Code	Description	Project	File	Line	Suppression State
Message	IDE0051	Private member 'ServicesAuthenticationForm.Cancel_Click' is unused.	Microsoft.VisualStudio.Editors	E:\project-system2\src\Microsoft.VisualStudio.Editors\PropPages\ServicesAuthenticationForm.vb	72	Active

[mavasani]

Fixed with #30980