To have Label more aligned with other existing classes (TextInput, TextArea, etc) now it will not be possible to set a text null in Label instances.
Note that existing applications (usually custom renderers) could need to check for not null before calling the Label setText(text) now, for example:
label.setText(text != null ? text : "");
- is related to
PIVOT-893 Set lower default value for maximumLength in TextInput and TextArea