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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def has_field(self, dotted_name):
 """ Checks whether the layer has the given field name. Can get a dotted name, i.e. layer.sublayer.subsublayer.field """

        parts = dotted_name.split('.')
        cur_layer = self
        for part in parts:
            if part in cur_layer.field_names:
                cur_layer = cur_layer.get_field(part)
            else:
                return False
        return True