'Return <lpaths> for this blob
where,
<lpaths> is a set of externally referencable lookup-paths, e.g.
[("YAHOO",), ("YAHOO", "util"), ...]
Note: The jury is out on whether this should include imports.
However, currently this is only being used for JS (no imports)
so it doesn\'t yet matter.'

def lpaths_from_blob(self, blob):

    return set((lpath for child in blob for lpath in _walk_js_symbols(child)))
