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HEAD /org.eclipse.jdt.doc.user/tips/jdt_tips.html#searching_section has an interesting entry "Search for methods with a specific return type". This information should also be available on the Java Development User Guide > Reference > Search page (/org.eclipse.jdt.doc.user/reference/ref-131.htm) Should also check if that works for fields too.
Fixed in ref-dialog-java-search.htm.
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