/// <summary>
/// Set Composable.
/// </summary>
public static void SetComposable(this IExtendable resource,
Composable composableValue)
{
switch (resource)
{
case StructureDefinition sDef: break;
case ElementDefinition eDef: break;
default: throw new Exception($"Can only set composable on an element definition");
}
resource.AddExtension(ComposableExtensionUri, new FhirString(composableValue.ToString()));
}