A ::com::sun::star::text::TextField is a ::com::sun::star::text::TextContent which fades its
textual representation into the text range to which it is anchored.
The selected item. If no item is selected this property
contains an emtpy string. If this property is set to a value
not present in the items of the dropdown field it is
invalidated, i.e. it is set to an empty string.
A ::com::sun::star::text::TextField is a ::com::sun::star::text::TextContent which fades its
textual representation into the text range to which it is anchored.
The selected item. If no item is selected this property
contains an emtpy string. If this property is set to a value
not present in the items of the dropdown field it is
invalidated, i.e. it is set to an empty string.