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>`