title: If GridSearchCV gives a few estimators with rank 1, which one will it pick as the best estimator?
body: <p>Using Scikit-learn's GridSearchCV, if GridSearchCV gives a few estimators with rank 1, which one will it pick as the best estimator <code>best_estimator_</code>? Will it pick the first estimator in the list that appears in <code>cv_results_</code>? </p>
  
  <p>Unless if I am going blind, I can't seem to find this in the documentation here: <a href="https://scikit-learn.org/stable/modules/generated/sklearn.model_selection.GridSearchCV.html" rel="nofollow noreferrer">https://scikit-learn.org/stable/modules/generated/sklearn.model_selection.GridSearchCV.html</a></p>
  
  <p>Many thanks in advance.</p>