title: Angular Material MatTableDataSource cannot be found
body: <p>I'm trying to create a table using <a href="https://material.angular.io/components/table/overview" rel="noreferrer">Angular Material Table</a>, in the examples there is always the import:</p>
  
  <pre><code>import {MatTableDataSource} from '@angular/material';
  </code></pre>
  
  <p>I'm trying to do the same but I'm getting an error: "Module '<em>../node_modules/@angular/material/material</em>' has no exported member <strong>MatTableDataSource</strong>.</p>
  
  <p>Is there anything I'm missing? </p>
  
  <p>Here's the package.json versions:</p>
  
  <pre><code>"dependencies": {
   "@angular/animations": "^4.4.6",
   "@angular/cdk": "^2.0.0-beta.12",
   "@angular/common": "^4.2.4",
   "@angular/compiler": "^4.2.4",
   "@angular/core": "^4.2.4",
   "@angular/forms": "^4.2.4",
   "@angular/http": "^4.2.4",
   "@angular/material": "^2.0.0-beta.12",
   "@angular/platform-browser": "^4.2.4",
   "@angular/platform-browser-dynamic": "^4.2.4",
   "@angular/router": "^4.2.4",
   "bootstrap": "^3.3.7",
   "core-js": "^2.4.1",
   "pdfmake": "^0.1.33",
   "rxjs": "^5.4.2",
   "zone.js": "^0.8.14"
  },
  "devDependencies": {
   "@angular/cli": "1.4.9",
   "@angular/compiler-cli": "^4.2.4",
   "@angular/language-service": "^4.2.4",
   "@types/jasmine": "~2.5.53",
   "@types/jasminewd2": "~2.0.2",
   "@types/node": "~6.0.60",
   "codelyzer": "~3.2.0",
   "jasmine-core": "~2.6.2",
   "jasmine-spec-reporter": "~4.1.0",
   "karma": "~1.7.0",
   "karma-chrome-launcher": "~2.1.1",
   "karma-cli": "~1.0.1",
   "karma-coverage-istanbul-reporter": "^1.2.1",
   "karma-jasmine": "~1.1.0",
   "karma-jasmine-html-reporter": "^0.2.2",
   "protractor": "~5.1.2",
   "ts-node": "~3.2.0",
   "tslint": "~5.7.0",
   "typescript": "~2.3.3"
  }
  </code></pre>