feat(accordion): use readonly arrays for inputs (#3426)
feat(accordion): use readonly arrays for inputs (#3426)


maxokorokov/core,ng-bootstrap/ng-bootstrap,benouat/ng-bootstrap,jnizet/ng-bootstrap,benouat/ng-bootstrap,fbasso/ng-bootstrap,jnizet/ng-bootstrap,ng-bootstrap/ng-bootstrap,ng-bootstrap/ng-bootstrap,benouat/ng-bootstrap,jnizet/ng-bootstrap,maxokorokov/core,fbasso/ng-bootstrap,ng-bootstrap/ng-bootstrap,fbasso/ng-bootstrap,maxokorokov/core,fbasso/ng-bootstrap,jnizet/ng-bootstrap,benouat/ng-bootstrap,maxokorokov/core