code: function getIdentifierReferences(path, loadPluginsVariableName) {
    const requireReferences = getReferences(path, loadPluginsVariableName);
  
    const identifierReferences = lodash(requireReferences)
      .map(getIdentifierVariableName)
      .filter()
      .map(identifierVariableName => getReferences(path, identifierVariableName))
      .flatten()
      .value();
  
    return identifierReferences;
  }
docs: Get the identifier references from imported/required load-plugin variable name.
  @example With code `a = plugins(), b = plugins()`, returns uasge references to `a` and `b`.