Browse the implementors of #beVariable message and you will find other filters under BPatternVariableNode class, such as #beInstVar or #beLocalVar. If you miss something, just add a method. No new syntax required.
"Families have described to me good experiences, terrible experiences. It is patchy, it is inconsistent and what this investigation is about, is trying to find out the things that move us from poor and bad to good and excellent.
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Nasa Apollo missions: Stories of the last Moon men
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