[Error/Bug] [Turtle] turtle.getFuelLevel and turtle.refuel

Hi!
When I open the "Interactive Lua promt" and do turtle.getFuelLvel I get back: function: d44e83 and when I do turtle. refuel I get back: function: d504cf
What does this mean? and what can I do about it?

Remember that apis, needs () after the name. Turtle.getFuelLevel()
-mikk809h

You're looking up the value of each, and the values are functions. Try calling them by appending parentheses to the end, i.e. turtle.refuel().

Thank you both