How to use draco3dgltf - 1 common examples

import * as vscode from 'vscode';
import * as Url from 'url';
import * as fs from 'fs';
import * as querystring from 'querystring';
import * as draco3dgltf from 'draco3dgltf';
import { getBuffer } from 'gltf-import-export';
import { sprintf } from 'sprintf-js';
import { getFromJsonPointer, btoa, atob, getAccessorData, AccessorTypeToNumComponents, getAccessorElement } from './utilities';
import { GLTF2 } from './GLTF2';
const decoderModule = draco3dgltf.createDecoderModule({});

interface QueryDataUri {
    viewColumn?: string,
    previewHtml?: string,
}

export class DataUriTextDocumentContentProvider implements vscode.TextDocumentContentProvider {
    private _onDidChange = new vscode.EventEmitter();
    private _context: vscode.ExtensionContext;

    public UriPrefix = 'gltf-dataUri:';

    constructor(context: vscode.ExtensionContext) {
        this._context = context;
    }