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def is_executable(self, path):
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return self.backing_tree.is_executable(path)
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# NB: This simply returns the parent tree's entries; the length may be
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# wrong but it can't easily be calculated without filtering the whole
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# text. Currently all callers cope with this; perhaps they should be
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# updated to a narrower interface that only provides things guaranteed
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# cheaply available across all trees. -- mbp 20110705
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return self.backing_tree.iter_entries_by_dir(
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return self.backing_tree.lock_read()