Javadoc
Returns the separator to be used for the given property. This method
is called by
writeProperty(). The string returned here
is used as separator between the property key and its value. Per
default the method checks whether a global separator is set. If this
is the case, it is returned. Otherwise the separator returned by
getCurrentSeparator() is used, which was set by the
associated layout object. Derived classes may implement a different
strategy for defining the separator.