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