To set a breakpoint, click the left margin (the line number ruler) in the source area . Clicking once sets a breakpoint, which should also show up in the Breakpoints area on the left. Clicking again removes the breakpoint.
Read moreHow do I run debug mode on flutter?
By default, flutter run compiles to debug mode. Your IDE supports this mode. Android Studio, for example, provides a Run > Debug… menu option , as well as a green bug icon overlayed with a small triangle on the project page.
Read moreHow do I use debug mode?
Set a breakpoint and start the debugger
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