I need help with IK set up for my characters feet

okay, just today I’ve been working on using ik_bones and I like to use those extra features on my characters. this is the problem this code is from the Doc from UE4 website. I know this code is important for my BP to have inside. on the picture, it says jumping jacks I’m sure I don’t have to use that exact animation. if I use my Rifle Idle animation or Jog Animation in the beginning of this code will it affect my animation graph?

can any one help please.