code: public Map<String, EntityDocument> getEntityDocuments(String... entityIds)
  			throws MediaWikiApiErrorException, IOException {
  		return getEntityDocuments(Arrays.asList(entityIds));
  	}
docs: Fetches the documents for the entities of the given string IDs. The
  result is a map from entity IDs to {@link EntityDocument} objects. It is
  possible that a requested ID could not be found: then this key is not set
  in the map.
  
  @param entityIds
  string IDs (e.g., "P31", "Q42") of requested entities
  @return map from IDs for which data could be found to the documents that
  were retrieved
  @throws MediaWikiApiErrorException
  @throws IOException