addTool method
Implementation
void addTool(DevTool tool, {bool? alwaysRun, ArgMapper? argMapper}) {
final runWhen = alwaysRun ?? false ? RunWhen.always : RunWhen.passing;
_specs.add(DevToolSpec(runWhen, tool, argMapper: argMapper));
if (tool.argParser != null) {
_argParser.addParser(tool.argParser!);
}
}