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: open_simplex.rs
    path of file: ./repos/noise-rs/src/noise_fns/generators
    
    the code of the file until where you have to start completion: //! Note that this is NOT Ken Perlin's simplex noise, as that is patent encumbered.
//! Instead, these functions use the `OpenSimplex` algorithm, as detailed here:
//! <http://uniblock.tumblr.com/post/97868843242/noise>

use crate::{
    core::open_simplex::{open_simplex_2d, open_
    
    fn set_seed(self, seed: u32) -> Self {
        // If the new seed is the same as the current seed, just return self.
        if self.seed == seed {
            return self;
        }

        // Otherwise, regenerate the permutation table based on the new seed.
        Self {
            seed,
            perm_table: PermutationTable::new(seed),
        }
    }