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This property specifies the pages to be operated upon.
Adding pages to a PageContents object can be a costly procedure
taking a noticable amount of time.
So if you are performing a set of analysis operations on the
same pages it can be more efficient to assign the PageContents from
one to another rather than repeatedly re-populate from the original
document.
Note that the UnembedComplexFonts option normally
results in document-wide changes. If this happens the PageContents
may be invalidated and will have to be re-built if required again.
While this happens invisibly it is a relatively expensive operation
and for this reason it is a good idea to perform this type of
operation last rather than first if you are performing a chain of
operations.
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