code: private void createExtensionDirectory(String coordinate, File atLocation)
    {
      if (atLocation.isDirectory()) {
        log.info("Directory [%s] already exists, skipping creating a directory", atLocation.getAbsolutePath());
        return;
      }
  
      if (!atLocation.mkdir()) {
        throw new ISE(
            "Unable to create directory at [%s] for coordinate [%s]",
            atLocation.getAbsolutePath(),
            coordinate
        );
      }
    }
docs: Create the extension directory for a specific maven coordinate.
  The name of this directory should be the artifactId in the coordinate