Checkbox in p-treeNode always checked when using custom icon

[michirem]

Describe the bug

The $implicit template context of the ngTemplateOutlet should return a boolean, but it returns the isSelected() function as string instead. $implicit should receive isSelected with parentheses isSelected().

<ng-template *ngTemplateOutlet="tree.checkboxIconTemplate; context: { $implicit: isSelected, partialSelected: node.partialSelected }"></ng-template>

should be

<ng-template *ngTemplateOutlet="tree.checkboxIconTemplate; context: { $implicit: isSelected(), partialSelected: node.partialSelected }"></ng-template>

Environment

Angular with primeng

Reproducer

No response

Angular version

15.2.8

PrimeNG version

15.4.1

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

18.16.0

Browser(s)

No response

Steps to reproduce the behavior

No response

Expected behavior

No response