def METHOD_NAME(self):
    """
    Takes a snapshot from the logical and merges snapshot with the
    logical volume.
    """
    self.create_lv()
    lv_utils.lv_mount(self.vg_name, self.lv_name, self.mount_loc,
                      create_filesystem=self.fs_name)
    lv_utils.lv_umount(self.vg_name, self.lv_name)
    lv_utils.lv_take_snapshot(self.vg_name, self.lv_name,
                              self.lv_snap_name,
                              self.lv_snapshot_size)
    lv_utils.lv_revert(self.vg_name, self.lv_name, self.lv_snap_name)
    self.mount_unmount_lv()