//! Time-stepping schemes for the finite-difference solver.
//!
//! Port of `ql/methods/finitedifferences/schemes/`. The boundary-condition
//! helper the schemes all hold landed first; #657 adds the [`Scheme`] contract
//! they meet and the two schemes the backward solver of #658 drives.
pub
pub use BoundaryConditionSchemeHelper;
pub use DouglasScheme;
pub use ImplicitEulerScheme;
pub use Scheme;