StockMovement

class StockMovement extends VendureEntity implements HasCustomFields {    @Column({ nullable: false, type: 'varchar' })    readonly type: StockMovementType;    @Index()    @ManyToOne(type => ProductVariant, variant => variant.stockMovements)    productVariant: ProductVariant;    @Index()    @ManyToOne(type => StockLocation, stockLocation => stockLocation.stockMovements, { onDelete: 'CASCADE' })    stockLocation: StockLocation;    @EntityId()    stockLocationId: ID;    @Column()    quantity: number;    @Column(type => CustomStockMovementFields)    customFields: CustomStockMovementFields;}

class Allocation extends StockMovement {    readonly type = StockMovementType.ALLOCATION;    constructor(input: DeepPartial<Allocation>)    @Index()    @ManyToOne(type => OrderLine, orderLine => orderLine.allocations)    orderLine: OrderLine;}

class Cancellation extends StockMovement {    readonly type = StockMovementType.CANCELLATION;    constructor(input: DeepPartial<Cancellation>)    @ManyToOne(type => OrderLine, orderLine => orderLine.cancellations)    orderLine: OrderLine;}

class Release extends StockMovement {    readonly type = StockMovementType.RELEASE;    constructor(input: DeepPartial<Release>)    @ManyToOne(type => OrderLine)    orderLine: OrderLine;}

class Sale extends StockMovement {    readonly type = StockMovementType.SALE;    constructor(input: DeepPartial<Sale>)    @ManyToOne(type => OrderLine, line => line.sales)    orderLine: OrderLine;}

class StockAdjustment extends StockMovement {    readonly type = StockMovementType.ADJUSTMENT;    constructor(input: DeepPartial<StockAdjustment>)}