Please help do these things with my dart$/$flutter app im including using vs code. $20-$ demonstrate a debugging breakpoint, in action

$20-$ demonstrate a conditional debugging breakpoint, in action

$20-$ Demonstrate where to find all the properties of the Scaffold widget in your running app. You must use Dart Devtools.

$20-$ Demonstrate breakpointing on a physical running device. class Palindrome $\{$

static check$($String s$)\{$

return $\_$check$($s$,0,$ s$.$length $-1)$;

$\}$

static $\_$check$($String s$,$ start, end$)\{$ if $($start $>$ end$)$ return true;

while $(!$isLetterOrDigit$($s$,$ start$))\{$

start$++$;

$\}$

while $(!$isLetterOrDigit$($s$,$ end$))\{$

end$--$;

$\}$

bool matching $=($s$[$start$].$toLowerCase$()==$ s$[$end$].$toLowerCase$())$;

return matching $?\_$check$($s$,$ start $+1,$ end $-1)$ : false;

$\}$

$\}$

bool isLetterOrDigit$($String s$,$ int idx$)=>$

s$[$idx$].$contains$($RegExp$($r$\text{'}[\backslash$da$-$zA$-$Z$]\text{'}))$;