Name: ooR10001 Date: 07/05/2000
structure of a class java.awt.GridBagLayout was changed in jdk1.4,
but field serialVersionUID not defined. This causes a compatibility
problem when deserialization from stream created by older jdk
was made. In this case serialVersionUID value computed by private
method computeSerialVersionUID() differs from a value in stream.
Suggested fix is to define serialVersionUID field in java.awt.GridBagLayout.