trait FlattenParamsExt {
// Required methods
fn estimate_subdiv(&self, sqrt_tol: f64) -> FlattenParams;
fn determine_subdiv_t(&self, params: &FlattenParams, x: f64) -> f64;
}trait FlattenParamsExt {
// Required methods
fn estimate_subdiv(&self, sqrt_tol: f64) -> FlattenParams;
fn determine_subdiv_t(&self, params: &FlattenParams, x: f64) -> f64;
}