How to use the @liskhq/lisk-validator.isValidTransferAmount function in @liskhq/lisk-validator

protected validateAsset(): ReadonlyArray {
		const asset = this.assetToJSON();
		const schemaErrors = validator.validate(transferAssetFormatSchema, asset);
		const errors = convertToAssetError(
			this.id,
			schemaErrors,
		) as TransactionError[];

		if (!isValidTransferAmount(this.asset.amount.toString())) {
			errors.push(
				new TransactionError(
					'Amount must be a valid number in string format.',
					this.id,
					'.asset.amount',
					this.asset.amount.toString(),
				),
			);
		}

		if (!this.asset.recipientId) {
			errors.push(
				new TransactionError(
					'`recipientId` must be provided.',
					this.id,
					'.asset.recipientId',