+getpackages($type)
+ Returns a list of packages in the control file.
+ Must pass "arch" or "indep" or "same" to specify arch-dependent or
+ -independent or same arch packages. If nothing is specified, returns all
+ packages.
+ As a side effect, populates %package_arches and %package_types with
+ the types of all packages (not only those returned).
+inhibit_log()
+ Prevent logging the program's successful finish to
+ debian/*debhelper.log
+load_log($package, $hashref)
+ Loads the log file for the given package and returns a list of
+ logged commands.
+ (Passing a hashref also causes it to populate the hash.)
+write_log($cmd, $package ...)
+ Writes the log files for the specified package(s), adding
+ the cmd to the end.
+
+Sequence Addons:
+---------------
+
+The dh(1) command has a --with <addon> parameter that ca be used to load
+a sequence addon module named Debian::Debhelper::Sequence::<addon>.
+These modules can add/remove commands to the dh command sequences, by
+calling some functions from Dh_Lib:
+
+insert_before($existing_command, $new_command)
+ Insert $new_command in sequences before $existing_command
+
+insert_after($existing_command, $new_command)
+ Insert $new_command in sequences after $existing_command
+
+remove_command($existing_command)
+ Remove $existing_command from the list of commands to run.
+
+Buildsystem Classes:
+-------------------
+
+The dh_auto_* commands are frontends that use debhelper buildsystem
+classes. These classes have names like Debian::Debhelper::Buildsystem::foo,
+and are derived from Debian::Debhelper::Buildsystem, or other, related
+classes.
+
+A buildsystem class needs to inherit or define these methods: DESCRIPTION,
+check_auto_buildable, build, test, install, clean. See the comments
+inside Debian::Debhelper::Buildsystem for details.
+
+Note that third-party buildsystems will not automatically be used by default,
+but can be forced to be used via the --buildsystem parameter.