Method that will be executed. Do not keep a reference to |entry| outside
of this callback. Return true (1) to continue visiting entries or false
(0) to stop. |current| is true (1) if this entry is the currently loaded
navigation entry. |index| is the 0-based index of this entry and |total|
is the total number of entries.
Method that will be executed. Do not keep a reference to |entry| outside of this callback. Return true (1) to continue visiting entries or false (0) to stop. |current| is true (1) if this entry is the currently loaded navigation entry. |index| is the 0-based index of this entry and |total| is the total number of entries.