//! Boundary operators for the outer faces of the domain (design ยง5.6).
//!//! PEC and PMC faces need no operator (see [`FaceCondition`](super::FaceCondition));
//! absorbing faces are built as PEC and then taken over by one of these.
pubmodcpml;pubmodmur;pubusecpml::{CpmlBoundary, CpmlCoefficients};pubusemur::MurBoundary;