title: How can I get the issuer of a css request in `css-loader` getLocalIdent?
body: <p>I want to use the <code>getLocalIdent</code> function for changing the <code>css-module</code> classes output name. Actually I want to access the issuer file name of a CSS file. for example, if I import my CSS file in <code>a.js</code> file, I want to get the <code>a.js</code> filename (or path) in the <code>getLocalIdent</code>.</p>
  <p>In the development mode, I can access it with <code>context._module.issuer.issuer.resource</code> but in the production, <code>_module.issuer</code> is null.</p>
  <p>How can I access to the issuer string?</p>
  <pre><code>getLocalIdent: (context, _localIdentName, localName, _options) =&gt; {
      return generateScopedName(localName, context._module.issuer.issuer.resource);
  },
  </code></pre>