Function assertMutable

packages/effect/src/Graph.ts:442–448

@internal

(
  graph: Graph<N, E, T> | MutableGraph<N, E, T>
)

/** @internal */
function assertMutable<N, E, T extends Kind = "directed">(
  graph: Graph<N, E, T> | MutableGraph<N, E, T>
): asserts graph is MutableGraph<N, E, T> {
  if (!graph.mutable) {
    throw new GraphError({ message: "Graph is not mutable" })
  }
}

// =============================================================================
// Constructors