Calling API Method

Hi there, I'm trying to modify R-Remover Tool to check for the owner from the Entity Owner plugin.

Specifically here

Code:

if (entity is BuildingBlock)
                {
                    var returnhook = Interface.GetMod().CallHook("FindBlockData", new object[] { entity as BuildingBlock });
                    if (returnhook is string)
                    {
                        string ownerid = (string)returnhook;
                        if (player.userID.ToString() == ownerid) return true;
                        if (useRustIO && RustIOIsInstalled())
                            if (HasFriend(ownerid, player.userID.ToString()))
                                return true;
                    }
                }

As you can see it is calling another plugin for this, but I want to change this.

The API from EntityOwner has these two API methods

Code:

// Gets the name and status of the owner player
// Returns null if no owner found
string GetOwnerName(BaseEntity entity)// Get the BasePlayer instance (if known) of the owner player
// Returns null if no owner found
BasePlayer GetOwnerPlayer(BaseEntity entity)

I'm not sure where to start, and I have been searching however I'm still a novice coder and I can't find anything that helps me.