code: private File generateMainStub(MavenArtifact artifact) throws IOException {
          final VelocityContext context = new VelocityContext();
          context.put("groupId", artifact.getCoordinates().getGroupId());
          context.put("artifactId", artifact.getCoordinates().getArtifactId());
  
          return generateRubyFile("main", context, "rubyMainStub");
      }
docs: ==