apply method

@override Outcome apply(ModelProject project, ProjectSelection selection)

Applies this to project, with selection as it was when the command was made.

Implementation

@override
Outcome apply(ModelProject project, ProjectSelection selection) {
  if (materialIndex < 0 || materialIndex >= project.materials.length) {
    return Outcome.refused('there is no material $materialIndex');
  }
  final ProjectMaterial material = project.materials[materialIndex];
  return Outcome.done(
    project.copyWith(
      materials: <ProjectMaterial>[
        for (var i = 0; i < project.materials.length; i++)
          i == materialIndex
              ? material.withGraph(graph)
              : project.materials[i],
      ],
    ),
  );
}