Description: -A project has a few custom functions defined in it.
-User exports this project as Project Library.
-User imports this Project Library in new project.
-User creates new Custom functions in current project
-User can not add catalog custom functions from the imported Project Library into the new custom function.
-User can not add built-in functions into the new custom function. Note: By default, adding the project library will only allow access to the functions in the rules source. To also use them in other Java files, it must be added to the Java build path.