You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: algorithm.rs
    path of file: ./repos/linfa/algorithms/linfa-clustering/src/dbscan
    
    the code of the file until where you have to start completion: use crate::dbscan::{DbscanParams, DbscanValidParams};
use linfa_nn::{
    distance::{Distance, L2Dist},
    CommonNearestNeighbour, NearestNeighbour, NearestNeighbourIndex,
};
use ndarray::{Array1, ArrayBase, Data, Ix2};
#[cfg(feature = "serde")]
use serde_crate::{Deserialize, Serialize};
use s
    
    fn l1_dist() {
        let data: Array2<f64> = arr2(&[
            // Outlier
            [0.0, 6.0],
            // Core point
            [0.0, 0.0],
            // Border points
            [2.0, 3.0],
            [1.0, -3.0],
            [-4.0, 1.0],
            [1.0, 1.0],
        ]);

        // Run the L1-dist dbscan with tolerance of 5.01, 5 min points for density
        let labels = Dbscan::params_with(5, L1Dist, BallTree)
            .tolerance(5.01)
            .check()
            .unwrap()
            .transform(&data);

        assert_eq!(labels[0], None);
        for id in labels.slice(s![1..]).iter() {
            assert_eq!(id, &Some(0));
        }
    }