title: Intellij - can be replaced with method reference
body: <p>Always when I use lambda expressions like this:</p>
  
  <pre><code>.map(obj -&gt; foo.makeSomething(obj))
  </code></pre>
  
  <p>IntelliJ suggests: "Can be replaced with method reference...". And when I try then:</p>
  
  <pre><code>.map(Foo::makeSomething)
  </code></pre>
  
  <p>I get the following statement: "Non-static method cannot be referenced from a static context". </p>
  
  <p>Why Idea suggests me I should use method reference if it's not correct?</p>