title: How to set family keys with pgfkeys and a macro?
body: <p>I want to set 2 keys of a pgfkeys-family using a macro :</p>
  
  <pre><code>\documentclass{article}
  \usepackage[utf8]{inputenc}
  \usepackage{pgf}
  \begin{document}
  \pgfkeys{
      /keys/.is family,
      /keys/.cd,
      test 1/.store in=\testone,
      test 1=unset,
      test 2/.store in=\testtwo,
      test 2=unset,
  }
  
  \pgfkeys{/store/.code={\pgfkeys{/keys/.cd,#1}}}
  \def\mykey{test 1=ONE,test 2=TWO}
  \pgfkeys{/store=\mykey}
  t1 : \testone,   
  t2 : \testtwo.
  \end{document}
  </code></pre>
  
  <p>I hope to get : </p>
  
  <pre><code>t1 : ONE, t2 : TWO.
  </code></pre>
  
  <p>And I get : </p>
  
  <pre><code>t1 : unset, t2 : unset
  </code></pre>
  
  <p>And an error message : </p>
  
  <pre><code>Package pgfkeys Error: I do not know the key '/keys/test 1=ONE,test 2=TWO'
  and I am going to ignore it. Perhaps you misspelled it.
  </code></pre>
  
  <p>What did i miss ?</p>