code: function applyTransformers(options, state, file) {
      var transformationSucceededAtLeastOnce = false;
      if (options.transformations && state.ext == "js") {
          options.transformations.forEach(function (transformation) {
              transformationSucceededAtLeastOnce |= transformAndTest(transformation, options, state, file);
          });
      }
      return transformationSucceededAtLeastOnce;
  }
docs: Applies all the custom transformers.
  
  Returns true iff any of the transformations made the predicate true.