Implicit Enhancement Options 

Implicit enhancement options are fixed points in compilation units – that is, points that remain intact even if the code is changed. This is important for the following reason: If the location of an enhancement is moved, you have to check manually after an upgrade whether the enhancement is still at the correct point and replace it if necessary. The following are implicit enhancement options at which enhancements can always be inserted:

·        You can always insert source code plug-ins before the first and the after the last line of includes, methods, reports, and function modules.

·        You can always add further optional parameters to function modules.

·        For global classes, there are different permanent, implicit options for enhancements: You can insert additional attributes or methods, and you can add optional parameters to existing methods.