using ng-bootstrap/ng-bootstrap. create modal and added let-c="close" and need to call it in .ts file as following c('Cross click') but return Cannot find name 'c'
 `<ng-template #upload let-modal let-c="close" let-d="dismiss">
        <div id="upload-new-image" class="mfp-with-anim col-4 form-popup">
            <form class="form-inline">
                <div class="input-group">
                    <label class="input-upload gray">
                        <input type="file" (change)="OnFileSelect($event)">
                        <span>{{_fileName}}</span>
                    </label>
                    <span class="error">{{_imgErrMsg}}</span>
                </div>
                <div class="input-group">
                    <label class="input-text">
                        <span class="label">Image Alt Text</span>
                        <input type="text" #alttexvalue>
                    </label>
                    <span class="error">{{_AltErrMsg}}</span>
                </div>
                <div class="align-content-right m-t-30">
                    <a href="#upload-success-message" class="btn btn-default open-form-popup" (click)="uploadOnsbmit(alttexvalue.value)"
                        data-effect="mfp-zoom-in">Upload</a>
                </div>
                <button type="button" class="close" aria-label="Close" (click)="c('Cross click')"></button>
            </form>
        </div>
    </ng-template>`
 
    