code: function makeExtractionCompileOptions(compileOptions, entryFilename, extractions, importer) {
    const extractionCompileOptions = Object.assign({}, compileOptions);
    const extractionFunctions = {};
  
    // Copy all extraction function for each file into one object for compilation
    Object.keys(extractions).forEach(extractionKey => {
      Object.assign(extractionFunctions, extractions[extractionKey].injectedFunctions);
    });
  
    extractionCompileOptions.functions = Object.assign(extractionFunctions, compileOptions.functions);
    extractionCompileOptions.data = extractions[entryFilename].injectedData;
    if(!makeExtractionCompileOptions.imported) {
      extractionCompileOptions.importer = importer;
    }
  
    return extractionCompileOptions;
  }
docs: Make the compilation option for the extraction rendering
  Set the data to be rendered to the injected source
  Add compilation functions and custom importer for injected sources