how to extract specific data from a leaflet variable/array

I have a variable created in leaflet and I need to extract a part of inside data that are gps coordinates, in order to use separately
This is my var and how it is generatared

var track = new L.GPX(‘tracce_gpx/Subit(via Porzûs)_Attimis.gpx’, {async: true, display_wpt:false, color: ‘#a539a8’,opacity:0.6,weight:6}).addTo(Video);

with “console.log(track);”

in browser console I obtain:

i {options: {…}, _gpx: 'tracce_gpx/Subit(via Porzûs)_Attimis.gpx', _layers: {…}, _initHooksCalled: true, _events: {…}, …}
options
: 
{async: true, display_wpt: false, color: '#a539a8', opacity: 0.6, weight: 6}

_events
: 
{click: Array(1)}

_gpx
: 
"tracce_gpx/Subit(via Porzûs)_Attimis.gpx"

_initHooksCalled
: 
true

_layers
: 
126
: 
i
options
: 
{async: true, display_wpt: false, color: '#a539a8', opacity: 0.6, weight: 6}

_bounds
: 
R {_southWest: D, _northEast: D}

_eventParents
: 
{125: i}

_events
: 
{click: Array(1), keypress: Array(1), remove: Array(1), move: Array(1)}

_initHooksCalled
: 
true

_latlngs
: 
Array(588)
[0 … 99]
[100 … 199]
[200 … 299]
[300 … 399]
[400 … 499]
[500 … 587]
length
: 
588
[[Prototype]]
: 
Array(0)

_leaflet_id
: 
126

_popup
: 
i {options: {…}, _source: i, _initHooksCalled: true, _content: '<p>12.0 km</p>'}

_popupHandlersAdded
: 
true
[[Prototype]]
: 
i
[[Prototype]]
: 
Object

_leaflet_id
: 
125
[[Prototype]]
: 
i

enter image description here

What a need is to extract and assign data from (_latlngs : ) to a new variable
this is a part of a more complicated question posted here:

How to create leaflet polyline, after loading Gpx track, with different colors

thanks for any suggestion