'Construct a Filter matching values starting with ``prefix``.
Parameters
prefix : str
String prefix against which to compare values produced by ``self``.
Returns
matches : Filter
Filter returning True for all sid/date pairs for which ``self``
produces a string starting with ``prefix``.'

@string_classifiers_only
@expect_types(prefix=(bytes, unicode))
def startswith(self, prefix):

    return ArrayPredicate(term=self, op=LabelArray.startswith, opargs=(prefix,))
