def indentBlock(block):
            cursor = cursorAtSpaceEnd(block)
            cursor.insertText(' ' if withSpace else self.text())
def test_supertype(self):
        self.assert_(isinstance(None, NullType))
        self.assert_(isinstance(Optional('a'), NullType))
        self.assert_(isinstance(NotPassed, NotPassedType))
        self.assert_(isinstance(NotPassed, NullType))