Question: How to Exchange functions between different packages?

Hello,

I have created my own costume package inspired from an already existing one but this package relies and uses many functions from the original package which I used to create mine. The question: is there an easy way to automatically import all the needed functions and commands from the original package without having to write the name of the original package followed by the name of each function or command ( which is really laborious and hard to complete) ?

Thank you

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