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Implicit
Enhancement Options in ABAP Source Codes 
In ABAP programs, implicit enhancement options are predefined at the following places:
· After the last line of the source code of executable programs, function groups, module pools, subroutine pools, and Include programs.
· Before the first and after the last line of the implementation of a procedure – that is, after the introductory statement and before the END statement.
· At the end of a visibility area in the declaration section of a local class.
· At the end of a list of formal parameters of the same name at the declaration of local methods.

Implicit enhancement options always exist and no enhancement spot is assigned to them.
The implicit enhancement options can be displayed in the ABAP Editor by following the path: Edit ® Enhancement Operations ® Show Implicit Enhancement Options, and then enhanced using source code plug-ins.