title: Move method to new file and keep it in the same class(make it partial)
body: <p>I have a lot of classes with several methods.
  And i need to separate each method of the class in its own file, but kept they in the same class( make it partial).</p>
  
  <p>Exploring the R# 6.1 options i haven't found linear possibility. May be there are hidden options?</p>
  
  <p>Thanks</p>
  
  <p>Added:</p>
  
  <p>This refactoring is not usual because this code is UI tests, that grouped in class by the part of functionality. 
  We need to separate them to be able to work on them separately from source control.</p>