code: function(uri) {
        var t = this;
  
        // Explicit library?
        var pos = uri.indexOf(":");
        if (pos !== -1) {
          var ns = uri.substring(0, pos);
          var library = this.__analyser.findLibrary(ns);
          return library || null;
        }
            
        // Non-wildcards are a direct lookup
        // check for $ and *. less pos wins
        // fix for https://github.com/qooxdoo/qooxdoo-compiler/issues/260
        var pos1 = uri.indexOf("$"); // Variable references are effectively a wildcard lookup
        var pos2 = uri.indexOf("*"); 
        if (pos1 === -1) {
          pos = pos2;
        } else if (pos2 === -1) {
          pos = pos1; 
        } else {
          pos = Math.min(pos1, pos2);
        } 
        if (pos === -1) {
          library = t.__librariesByResourceUri[uri] || null;
          return library;
        }
  
        // Strip wildcard
        var isFolderMatch = uri[pos - 1] === "/";
        uri = uri.substring(0, pos - 1);
  
        // Fast folder match
        if (isFolderMatch) {
          library = t.__librariesByResourceFolderUri[uri] || null;
          return library;
        }
  
        // Slow scan
        pos = qx.tool.compiler.utils.Values.binaryStartsWith(t.__allResourceUris, uri);
        if (pos > -1) {
          var firstUri = t.__allResourceUris[pos];
          library = t.__librariesByResourceUri[firstUri] || t.__librariesByResourceFolderUri[firstUri] || null;
          return library;
        }
  
        return null;
      }
docs: Finds the library needed for a resource; this depends on `findAllResources` having
  already been called.  `uri` can include optional explicit namespace (eg "qx:blah/blah.png"),
  otherwise the library resource lookups are examined to find the library.
  
  @param uri {String} URI
  @return {Library?} the library, null if not found