case there isn't a parent method, PARENT_HANDLER will return it. More about
this later.
.PP
+Default return:
+.PP
+Some signal and virtual methods have a return type. But what happens if
+there is no default handler and no one connects to a signal. GOB will
+normally have the wrappers return whatever you specify with onerror or '0'
+if you haven't specified anything. But since 0.93.2 you can specify a default
+return value with the keyword 'defreturn'. It's use is identical to the
+use of onerror, and you can in fact use both at the same time. Example
+.nf
+
+ virtual int get_some_int(self) onerror -1 defreturn 10 ;
+
+.fi
+That is an empty virtual method (in C++ terms a pure virtual). If you never
+specify any handler for it in the derived children it will just return 10.
+.PP
Constructor methods:
.PP
There are two methods that handle the construction of an object, init and