The start and end position of a patchable area are marked by comments (as used in the programming language the source file is written in). "m23customPatchBegin" is the keyword for the start of the patchable area, "m23customPatchEnd" for its end. Both keywords must be in different lines with "m23customPatchBegin" before "m23customPatchEnd". Patchable areas may not overlap.
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