docs: private List<StubTransformer> getStubTransformers() {
          if (this.stubTransformers == null) {
              final Collection<StubTransformer> transformers =
                      this.applicationContext.getBeansOfType(StubTransformer.class).values();
              this.stubTransformers = new ArrayList<>(transformers);
              return this.stubTransformers;
          }
          return this.stubTransformers;
      }