+%%% patching commands
+\RequirePackage{filehook}
+
+\def\ltj@pkgpatch@im#1{%
+ \@ifnextchar[{\ltj@pkgpatch@im@{#1}}{\ltj@pkgpatch@im@{#1}[lltjp-#1]}}%]
+\def\ltj@pkgpatch@im@#1[#2]{%
+ \AtEndOfPackageFile*{#1}{%
+ \@ifpackageloaded{#2}{}{%
+ \@namedef{ver@#2.\@pkgextension}{0000/00/00}%dummy
+ \if\catcode`@=11\let\ltj@temp\relax\else
+ \edef\ltj@temp{\noexpand\catcode`@=\the\catcode`@\relax}\makeatletter
+ \fi
+ \@@input{#2.\@pkgextension}\ltj@temp
+ }%
+ }%
+}
+
+\def\ltj@pkgpatch#1{%
+ \@ifnextchar[{\ltj@pkgpatch@@{#1}}{\ltj@pkgpatch@@{#1}[lltjp-#1]}}%]
+\def\ltj@pkgpatch@@#1[#2]{%
+ \gpreto\@begindocumenthook{%
+ \@ifpackageloaded{#1}{%
+ \@ifpackageloaded{#2}{}{\RequirePackage{#2}}%
+ }{}%
+ }%
+}
+