title: No module named 'gensim.sklearn_api'
body: <p>I try to use</p>
  
  <pre><code>from gensim.sklearn_api import W2VTransformer
  </code></pre>
  
  <p>and get</p>
  
  <pre><code>ImportError: No module named 'gensim.sklearn_api'
  </code></pre>
  
  <p>I used </p>
  
  <pre><code>import gensim
  import sklearn
  from sklearn.base import BaseEstimator, TransformerMixin
  </code></pre>
  
  <p>and get the same.
  In <a href="https://radimrehurek.com/gensim/sklearn_api/w2vmodel.html" rel="nofollow noreferrer">sklearn_api.w2vmodel – Scikit learn wrapper for word2vec model</a> I could find no advice. 
  How to install <code>gensim.sklearn_api</code>?</p>