public com.google.cloud.datalabeling.v1beta1.LabelImagePolylineOperationMetadata
      getImagePolylineDetails() {
    if (detailsCase_ == 12) {
      return (com.google.cloud.datalabeling.v1beta1.LabelImagePolylineOperationMetadata) details_;
    }
    return com.google.cloud.datalabeling.v1beta1.LabelImagePolylineOperationMetadata
        .getDefaultInstance();
  }
public com . google . cloud . datalabeling . v1beta1 . LabelImagePolylineOperationMetadata getImagePolylineDetails ( ) { if ( detailsCase_ == 12 ) { return ( com . google . cloud . datalabeling . v1beta1 . LabelImagePolylineOperationMetadata ) details_ ; } return com . google . cloud . datalabeling . v1beta1 . LabelImagePolylineOperationMetadata . getDefaultInstance ( ) ; }
<code>
.google.cloud.datalabeling.v1beta1.LabelImagePolylineOperationMetadata image_polyline_details = 12;
</code>