def run(self):
    """Run method that performs all the real work"""
    layers = self.iface.legendInterface().layers()
    # layer_list = []
    # for layer in layers:
    #     layer_list.append(layer.name())

    layer = layer_pois2
    layer.setSubsetString('"fclass" = "bank"  AND "name" = "meezan bank"')