Aggregates methods from a class to an existing object using a regular expression to match method names.
The class constructor or methods whose names start with an underscore character (_), which are considered private to the aggregated class, are always excluded.
The optional parameter exclude is used to
decide whether the regular expression will select the names of methods
to include in the aggregation (i.e. exclude is
FALSE, which is the default value), or to exclude from the
aggregation (exclude is