function dispatchDraggedElementLeftContainerForAnother(containerEl, draggedEl, theOtherDz) {
    containerEl.dispatchEvent(
        new CustomEvent(DRAGGED_LEFT_EVENT_NAME, {
            detail: {draggedEl, type: DRAGGED_LEFT_TYPES.LEFT_FOR_ANOTHER, theOtherDz}
        })
    );
}
@param containerEl - the dropzone the element left
@param draggedEl - the dragged element
@param theOtherDz - the new dropzone the element entered