How to use the @angular/cdk/drag-drop.moveItemInArray function in @angular/cdk

reorderDrop(event: CdkDragDrop) {
    moveItemInArray(this.bucket.objectives, event.previousIndex, event.currentIndex);
    if (event.previousIndex != event.currentIndex) {
      this.onChanged.emit(this.bucket);
    }
  }

drop(event: CdkDragDrop) {
        moveItemInArray(this.cipher.fields, event.previousIndex, event.currentIndex);
    }

drop(event: CdkDragDrop) {
    moveItemInArray(this.selected, event.previousIndex, event.currentIndex);
  }

public columnDropped(event: CdkDragDrop): void {
    const columns = this.allPossibleColumns.slice();
    moveItemInArray(columns, event.previousIndex, event.currentIndex);

    this.allPossibleColumns = columns;
    this.changeDetectorRef.detectChanges();
  }

dropWidget(event: CdkDragDrop) {
    if (event.previousContainer === event.container) {
      moveItemInArray(event.container.data, event.previousIndex, event.currentIndex);
    } else {
      transferArrayItem(
          event.previousContainer.data, event.container.data, event.previousIndex,
          event.currentIndex);
    }
    this.save();
  }
}

taskDrop(event: CdkDragDrop) {
    moveItemInArray(this.board.tasks, event.previousIndex, event.currentIndex);
    this.boardService.updateTasks(this.board.id, this.board.tasks);
  }

moveItem(fromIndex: number, toIndex: number): void {
    if (this._lastRange) {
      fromIndex = this._lastRange.start + fromIndex;
      toIndex = this._lastRange.start + toIndex;
    }

    if (this.length > 0) {
      moveItemInArray(this._source, fromIndex, toIndex)
      const data = this._lastRange
        ? this._source.slice(this._lastRange.start, this._lastRange.end)
        : this._source
      ;
      this._renderData$.next(data);
    }
  }

drop(event: CdkDragDrop) {
    if (event.previousContainer === event.container) {
      moveItemInArray(event.container.data, event.previousIndex, event.currentIndex);
    } else {
      transferArrayItem(event.previousContainer.data,
                        event.container.data,
                        event.previousIndex,
                        event.currentIndex);
    }
  }
}

drop(event: CdkDragDrop, extensionPoint) {
    if (event.previousIndex !== event.currentIndex) {
      moveItemInArray(this.policies[extensionPoint], event.previousIndex, event.currentIndex);
      this.policies[extensionPoint].forEach(function (policy, i) {
        policy.order = i;
      });
      this.policyService.updateAll(this.domainId, this.policies[extensionPoint]).subscribe(() => {
        this.snackbarService.open("Policy's order changed");
      });
    }
  }

onDrop(event: CdkDragDrop): void {
    this.emitEvent(Event.onRowDrop, event);
    moveItemInArray(this.data, event.previousIndex, event.currentIndex);
  }