Function lbfgsb_optimize 

pub fn lbfgsb_optimize<F, C>(
    x: &mut [f64],
    bounds: &[(f64, f64)],
    objective: &F,
    max_iterations: usize,
    tol: f64,
    callback: Option<C>,
    config: Option<LbfgsbConfig>,
) -> Result<(f64, Vec<f64>), Box<dyn Error>>
where
    F: Fn(&[f64]) -> f64 + Sync,
    C: Fn(&[f64], f64) + Sync,

L-BFGS-B optimizer implementation with optional configuration.

Arguments

• x - Initial point (will be modified in-place)
• bounds - Box constraints for each parameter
• objective - Objective function to minimize
• max_iterations - Maximum number of iterations
• tol - Convergence tolerance for gradient norm
• callback - Optional callback function invoked after each iteration
• config - Optional configuration parameters (uses defaults if None)

Returns

• Result<(f64, Vec<f64>), Box<dyn std::error::Error>> - Best objective value and parameters