如何将2D字符串数组(未知维度)作为参数传递给Rust中的函数

[dependencies]
ndarray = "0.15"

use ndarray::Array2;

fn process_2d_array(arr: Array2<&str>) {
    for row in arr.rows() {
        for &element in row {
            println!("{}", element);
        }
    }
}

fn main() {
    let arr: Array2<&str> = array![
        ["a", "b", "c"],
        ["d", "e", "f"],
        ["g", "h", "i"]
    ];

    process_2d_array(arr);
}