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;
}
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`.