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: settings.rs
    path of file: ./repos/cv/cv-sfm/src
    
    the code of the file until where you have to start completion: #[cfg(feature = "serde-serialize")]
use serde::{Deserialize, Serialize};

/// The settings for the VSlam process.
#[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
#[derive(Debug, Copy, Clone)]
pub struct VSlamSettings {
    /// The threshold used for akaze
    #[cfg_attr(
        feature = "serde-serialize",
        serde(default = "default_akaze_threshold")
    )]
    pub akaze_threshold: f64,
    /// The maximum cosine distance of an observation for it to be considered robust enough for optimization
    #[cfg_attr(
        feature = "serde-serialize",
        serde(default = "default_maximum_cosine_distance")
    )]
    pub maximum_cosine_distance: f64,
    /// The maximum sine distance of a two-view observation for it to exist
    #[cfg_attr(
        feature = "serde-serialize",
        serde(default = "default_maximum_sine_distance")
    )]
    pub maximum_sine_distance: f64,
    /// The minimum cosine distance between two bearings that successfully match in a view
    /// for the view to be considered part o
    
    fn default() -> Self {
        Self {
            akaze_threshold: default_akaze_threshold(),
            maximum_cosine_distance: default_maximum_cosine_distance(),
            maximum_sine_distance: default_maximum_sine_distance(),
            robust_view_bearing_pair_minimum_cosine_distance:
                default_robust_view_bearing_pair_minimum_cosine_distance(),
            robust_view_num_robust_bearing_pair: default_robust_view_num_robust_bearing_pair(),
            minimum_robust_landmarks: default_minimum_robust_landmarks(),
            robust_minimum_observations: default_robust_minimum_observations(),
            robust_observation_incidence_minimum_cosine_distance:
                default_robust_observation_incidence_minimum_cosine_distance(),
            single_view_consensus_threshold: default_single_view_consensus_threshold(),
            single_view_optimization_num_matches: default_single_view_optimization_num_matches(),
            single_view_filter_loop_iterations: default_single_view_filter_loop_iterations(),
            single_view_patience: default_single_view_patience(),
            single_view_initial_features: default_single_view_initial_features(),
            single_view_optimization_rate: default_single_view_optimization_rate(),
            single_view_minimum_landmarks: default_single_view_minimum_landmarks(),
            single_view_minimum_robust_landmarks: default_single_view_minimum_robust_landmarks(),
            single_view_match_better_by: default_single_view_match_better_by(),
            two_view_consensus_threshold: default_two_view_consensus_threshold(),
            two_view_minimum_robust_matches: default_two_view_minimum_robust_matches(),
            two_view_match_better_by: default_two_view_match_better_by(),
            two_view_optimization_maximum_matches: default_two_view_optimization_maximum_matches(),
            two_view_patience: default_two_view_patience(),
            three_view_patience: default_three_view_patience(),
            three_view_filter_loop_iterations: default_three_view_filter_loop_iterations(),
            three_view_optimization_landmarks: default_three_view_optimization_landmarks(),
            three_view_minimum_robust_matches: default_three_view_minimum_robust_matches(),
            three_view_minimum_relative_scales: default_three_view_minimum_relative_scales(),
            reconstruction_optimization_iterations: default_reconstruction_optimization_iterations(
            ),
            tracking_features: default_tracking_features(),
            tracking_similar_frames: default_tracking_similar_frames(),
            tracking_similar_frame_recent_threshold:
                default_tracking_similar_frame_recent_threshold(),
            tracking_similar_frame_search_num: default_tracking_similar_frame_search_num(),
            tracking_recent_frames: default_tracking_recent_frames(),
            optimization_maximum_three_view_constraints:
                default_optimization_maximum_three_view_constraints(),
            optimization_minimum_new_constraints: default_optimization_minimum_new_constraints(),
            optimization_iterations: default_optimization_iterations(),
            optimization_minimum_landmarks: default_optimization_minimum_landmarks(),
            optimization_maximum_landmarks: default_optimization_maximum_landmarks(),
            optimization_robust_covisibility_minimum_landmarks:
                default_optimization_robust_covisibility_minimum_landmarks(),
            graph_optimization_rate: default_graph_optimization_rate(),
            constraint_patience: default_constraint_patience(),
        }
    }