Open the Check's source file by double click on it in a source tree as is shown:
Debug the Check by putting the breakpoint at controversial place (double-click)
on the left part of line number as it is shown:
Then right-click the corresponding Unit-test file or class definition > Debug Test File
Then manage you debug operations by Ctrl+F7 (Step Out), F7 (Step Into),
Shift+F8 (Step Over Expression), Step Over (F8)
