Click Repository tree view.
in the The system routines are stored under the system folder and are classified according to their usage. Each system routine contains several functions.Note: The system folder and system routines are read only. If you have subscribed to one of the Talend solutions with the Profiling or MDM perspective, you will also have access to the system routines specific to Talend Data Quality or MDM.
Double-click the system routine you are interested in, for
The routine editor opens. All functions within a system routine are composed of some descriptive text, followed by the corresponding Java code.
You can click the name of your interested function in the Outline view on the bottom left of the Studio to jump directly to its corresponding code. Alternatively, you can press Ctrl+O in the routine editor and then select your interested function from the list displayed to locate the function.