NativeScript + Mapbox pluggin: mapbox.show() error - mapbox

Question

After a lot of try and error, trying to find a solution to this, I understood thanks to help of Eddy Verbruggen that there two unique way to add markers to mapbox map: by code inside of onMapReady() or programmatically.
But now, I find something that I can not solve: using exactly code indicated Declaring a map programmatically, when run the app appears errors originated in "TypeError: mapbox.show is not a function".
The code is:
`var mapbox = require("nativescript-mapbox");
var platform = require("platform");
var isIOS = platform.device.os === platform.platformNames.ios;
mapbox.show({
accessToken: 'here i wrote my own API ACCESS TOKEN',
style: street,
margins: {
left: 40, // default 0
right: 40, // default 0
top: 450, // default 0
bottom: isIOS ? 50: 0
},
center: { // optional without a default
lat: 52.3702160,
lng: 4.8951680
},
zoomLevel: 9.25,
showUserLocation: true,
hideAttribution: false,
hideLogo: false,
hideCompass: false,
disableRotation: false,
disableScroll: false,
disableZoom: false,
markers: [
{
id: 1,
lat: 52.3732160,
lng: 4.8941680,
title: 'Nice location',
subtitle: 'Really really nice location',
icon: 'res://cool_marker',
selected: true,
onTap: function(marker) { console.log("This marker was tapped"); },
onCalloutTap: function(marker) { console.log("marker was tapped"); }
}
]
}).then(
function(showResult) {
console.log("Mapbox show done for " + (showResult.ios ? "iOS" :
"Android") + ", native object received: " + (showResult.ios ?
showResult.ios : showResult.android));
},
function(error) {
console.log("mapbox show error: " + error);
}
)`
To clarify, the app is build from "tns create my-app-name --template tns-template-blank". I only added nativescript-mapbox plugin and insert code indicate in "Declaring a map programmatically" inside on home.js file.
I can't understand why appear that error, I'm sure that plugin was correctly installed. The app uses NS version 3.4.1 and nativescript-mapbox version 3.3.0, on Android.