Suppose that you want to find and mark all the buttons in the Transcript which have no accelerator key.
[:x | (x respondsTo: #accelerator) and: [x accelerator isNil] ]
(Note: the (x respondsTo: #accelerator) is not
strictly necessary but may result in a more efficient search.)
The Snooper display contracts to only the self line. This is because there are no such objects to depth 2 in the Transcript window. We will try again, increasing the depth.
The Snooper shows up with certain values (those push buttons with no
accelerator) selected. They are also marked with the symbol you
selected. (If you later change the selection, the marks will
remain.)