Fire change event, use ParamChecks, fix NB warnings.
Fix NB warnings.
Use ParamChecks.
Update Javadoc.
Fix NB warnings.
Use ParamChecks.
Use ParamChecks.
Use ParamChecks and fix NB warnings.
Use ParamChecks.
Use ParamChecks.
Fix rendering bug when axis is inverted.
Use ParamChecks.
Fix failing test.
Fix failing test.
Use ParamChecks.
Use ParamChecks.
Use ParamChecks.
Use ParamChecks and fireChangeEvent()
Use ParamChecks and fireChangeEvent()
Fix immutability of PeriodAxisLabelInfo.