bootstrap/src/main/java/com/streamsets/pipeline/BlackListURLClassLoader.java
void validateResource(String name) {
    for (String blacklistedPackage : blacklistedDirs) {
      if (name.startsWith(blacklistedPackage)) {
        throw new IllegalArgumentException(String.format("Resource '%s' cannot be present in %s",
                                                         name, toString()));
      }
    }
  }
void validateResource(String name) {
    for (String blacklistedPackage : blacklistedDirs) {
      if (name.startsWith(blacklistedPackage)) {
        throw new IllegalArgumentException(String.format("Resource '%s' cannot be present in %s",
                                                         name, toString()));
      }
    }
  }
Visible for testing only