use feature "try";
use constant CHECK_HINTHASH => 0;
sub check_hinthash {warn "feature_try = ".$^H{feature_try} if CHECK_HINTHASH}
#...

BEGIN { check_hinthash() }	# feature enabled

{
  no feature qw( try );
  BEGIN { check_hinthash() }	# feature disabled
  use Try::Tiny qw( try catch );
   
  try { ... };   
}

BEGIN { check_hinthash() }	# feature enabled

# try { ... };  <-- would fail