Interface used to store the available
OFunction instances on a database.
CREATE FUNCTION statement. Internally, OrientDB stores functions as a series of
OFunction instances. When working in a Java, you can define series of new functions internally from your application code.
You can retrieve the function library from
ODatabaseDocument by first retrieving the metadata with the
getMetadata() method and then retrieving the function library from the metadata with the
getFunctionLibrary() method. In order to operate on the function library, you also need to import it into your code.