Bot look in a direction. Can't understand the API

[DonEli2024]

bot.look(yaw, pitch, [force])
This function returns a Promise, with void as its argument called when you are looking at yaw and pitch.

Set the direction your head is facing.

yaw - The number of radians to rotate around the vertical axis, starting from due east. Counter clockwise.
pitch - Number of radians to point up or down. 0 means straight forward. pi / 2 means straight up. -pi / 2 means straight down.
force - If present and true, skips the smooth server-side transition. Specify this to true if you need the server to know exactly where you are looking, such as for dropping items or shooting arrows. This is not needed for client-side calculation such as walking direction.

I read through it and tried it a bit but somehow it doesn't work.
Can someone help me and give me an exaple how to use?