Moves example to right place, refs #2809

Author: JJ

doc/Type/Backtrace.pod6

@@ -24,13 +24,6 @@ if ($!) {
 This will print the last dataframe in the list, pointing at the line where it's
 happened.
 
-=for code
-sub zipi { { { die "Something bad happened" }() }() };
-try zipi;
-say $!.backtrace.nice( :oneline ) if $!                           │
-# OUTPUT: «  in sub zipi at /tmp/Ik2MevkgP1 line 1␤␤»
-
-
 =head1 Methods
 
 =head2 method new
@@ -73,6 +66,23 @@ the implementation, also some routines from the setting.
     my $backtrace = Backtrace.new;
     say $backtrace.Str;
 
+=head2 method next-interesting-index
+
+Defined as:
+
+    method next-interesting-index(Backtrace:D: Int $idx = 0, :$named, :$noproto, :$setting)
+
+Returns the index of the next C<interesting> frame, once hidden and other
+settings are taken into account. C<$named> will decide whether to printed only
+those with a name, C<$noproto> will hide C<proto>s, and C<$setting> will hide
+those are considered setting.
+
+=for code
+sub zipi { { { die "Something bad happened" }() }() };
+try zipi;
+say $!.backtrace.next-interesting-index;           # OUTPUT: «2␤»
+say $!.backtrace.next-interesting-index( :named ); #  OUTPUT: «4␤»
+
 =head2 method nice
 
 Defined as:
@@ -82,6 +92,13 @@ Defined as:
 Returns the backtrace as a list of I<interesting> frames. If C<:$oneline> is
 set, will stop after the first frame.
 
+=for code
+sub zipi { { { die "Something bad happened" }() }() };
+try zipi;
+say $!.backtrace.nice( :oneline ) if $!                           │
+# OUTPUT: «  in sub zipi at /tmp/Ik2MevkgP1 line 1␤␤»
+
+
 =head2 method full
 
 Defined as: