//! Volatility surface and cube definitions.
//!
//! Interpolated volatility surfaces, volatility cubes, and
//! quote-indexing types for equity and rates vol.
/// Interpolated two-dimensional volatility surface.
/// Interpolated three-dimensional volatility cube.
/// Volatility-cube interface.
/// Quote coordinates used to address volatility data.
/// Volatility-surface interface.
/// Serializable volatility-surface configuration.
/// Serializable volatility-cube configuration.
/// Volatility-surface construction from market data.
/// Volatility-cube construction from market data.
/// Model calibration configuration.