How to "fastboot flashing unlock" when device has no volume rocker? I have a android tablet that has no volume buttons, but has an unlocked OEM bootloader. I'm trying to flash a new rom, and after I run fastboot flashing unlock I am presented with a prompt that asks for me to press volume up. 

Is there anyway to override this prompt? like -y or something?

I'm asking for a general solution as this problem happens to a lot of people from time-to-time. Whether it be from a broken rocker or from a device that has no volume buttons.

Edit: I didn't think to add the type of tablet, since none of you all would have heard of it. It is an eewrite e-pad pro by Wisky (sold by novadealshop) running Android 7.1.1. Any additional information about its specs can be found here: https://www.reddit.com/r/e_pad/comments/drmi5s/full_device_info_for_eewriter_epad_by_wisky/
When a device has no volume rocker it is usually flashed using an external tool and not via traditional fastboot methods.
In this case, the device is a MediaTek Android smartphone (MTK based), and nearly every smartphone with this chipset can be flashed not using fastboot, but with the SP Flash Tool.
The latest version SPFlash Tool v5.1924 can be downloaded at:
spflashtool.com or androidmtk.com
This tool allows the flashing of Scatter Based Stock Firmware on devices powered by Mediatek Chipsets. All you need is the correct Scatter based Stock Firmware of your Device.