title: Process to intersect with pre-trained word vectors with gensim 4.0.0
body: <p>I'm trying to learn from an example which uses an older version of gensim. In particular, I have a section of code like:</p>
  <pre><code>word_vectors = Word2Vec(vector_size=word_vector_dim, min_count=1)
  word_vectors.build_vocab(corpus_iterable)
  word_vectors.intersect_word2vec_format(pretrained_dir + 'GoogleNews-vectors-negative300.bin.gz', binary=True)
  </code></pre>
  <p>My understanding is that this fills the word vector vocabulary with pre-trained word vectors when available. When the words in my vocabulary are not in the pretrained vectors, they are initialized to random values. However, the method <code>intersect_word2vec_format</code> doesn't exist in the latest version of gensim. What is the cleanest way to replicate this process in gensim 4.0.0?</p>