1. A method, comprising: displaying, with a processor of a computer, in a visualization, program code having functions, nested breakpoints, and an indication of whether each of the breakpoints is likely to be reached; in response to receiving input that selects a function from the functions, displaying a call graph for the functions in the program code to enable viewing where each of the nested breakpoints is located in the program code with reference to the functions; and providing an option to disable a nested breakpoint of the nested breakpoints for a current execution of the program code; and in response to receiving input that selects the option, disabling the nested breakpoint.