# How to include pdfpage with subsection written on top?

I am using pdfpages package and I have a 3 page document of pdf I want to insert into my main document. But the problem is I can't get the subsection heading to show on the top of the page before the pdf file is inserted ONLY ONCE. I used pagecommand but what that does is for everypage it writes out the subsection at the top. Here is the code im using Here is the code I am using

\usepackage{pdfpages}
...
\includepdf[pages=-,pagecommand=\subsection{List of use cases}]{SE2.pdf}


What am i doing wrong?

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\def\mysect{%