//! MLS Chapter 9: Connectors and Connections
//!
//! This module tests conformance to MLS 3.7-dev Chapter 9, which defines:
//! - §9.1 Connect-Equations and Connectors
//! - §9.2 Generation of Connection Equations
//! - §9.3 Restrictions of Connections
//! - §9.4 Overconstrained Connections
//!
//! Reference: https://specification.modelica.org/master/connectors-connections.html