docs: protected Proto searchFromAll(String path, Proto importer) throws Exception
      {
          if (path.startsWith("http://"))
          {
              URL url = new URL(path);
              return loadFrom(url, importer);
          }
  
          File protoFile, importerFile = importer.getFile();
          if (importerFile == null)
              protoFile = new File(path);
          else
          {
              // check if its relative to its importer's dir.
              protoFile = new File(importerFile.getAbsoluteFile().getParentFile(), path);
              if (!protoFile.exists() && !(protoFile = new File(path)).exists())
              {
                  // check if its relative to its importer's package base dir.
                  File baseDir = getBaseDirFromPackagePath(path, importer);
                  if (baseDir != null)
                      protoFile = new File(baseDir, path);
              }
  
              if (!protoFile.exists() && !__protoLoadDirs.isEmpty())
              {
                  // check from the "proto_path" provided as a system property
                  for (File dir : __protoLoadDirs)
                  {
                      if ((protoFile = new File(dir, path)).exists())
                      {
                          // found
                          break;
                      }
                  }
              }
          }
  
          if (protoFile.exists())
              return loadFrom(protoFile, importer);
  
          // last resort (defaults to classpath lookup).
          Proto protoFromOtherResource = loadFromOtherResource(path, importer);
          if (protoFromOtherResource == null)
          {
              throw new IllegalStateException("Imported proto " + path +
                      " not found. (" + importer.getSourcePath() + ")");
          }
  
          return protoFromOtherResource;
      }