title: Member "name" not found or not visible after argument-dependent lookup in struct xxx storage ref[] storage ref
body: <p>Solifity 0.8.0</p>
  <p>with struct</p>
  <blockquote>
  <p>struct Placeholder{ string a; uint256 b; }</p>
  </blockquote>
  <blockquote>
  <p>mapping(uint256 =&gt; Placeholder[]) public placeholder;</p>
  </blockquote>
  <p>why this error</p>
  <blockquote>
  <p>Member &quot;b&quot; not found or not visible after argument-dependent lookup in struct TestSM.Placeholderstorage ref[] storage ref.</p>
  </blockquote>
  <p>is thrown when I try to get values?</p>
  <blockquote>
  <p>placeholder[token_id].b</p>
  </blockquote>
  <p>Any help is more than appreciated. I'm blocked :/</p>