public static Map<String, Vertex5[]> importVertsFromJson(String filePath) {
        try (FileReader reader = new FileReader(filePath)) {
            return importVertsFromJson(reader);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
Exports a map of verts to a json file (i.e. groups of a CCModel for example)
@param filePath The path to the destination file (directories must exist)
@param vertGroups The map of vert groups to export
core/src/main/java/mrtjp/projectred/lib/ModelLib.java