This method removes all groups, group sections, fields and parameters, it resets the FlexReport.DataSources collection so it will contain single FlexReport.DataSource object with name "Main". Resets properties of all nested objects like FlexReport.Layout, FlexReport.Watermark etc. Clears (but does not remove) the fixed sections that all reports have: Detail, Header, Footer, PageHeader, and PageFooter.
Use this method when you want to clear a report and start creating a new one from scratch.