Swift Array Extension to merge unique values into an existing array. Elements must be conform to the Equatable protocol

Array+Extension.swift

//The array passed to the function is the array of object that will be omitted from the final array. Important if your merging an array of objects where the Equatable property may be the same but others may differ.
extension Array where Element: Equatable {
  
  public mutating func mergeElements<C : Collection>(newElements: C) where C.Iterator.Element == Element{
    let filteredList = newElements.filter({!self.contains($0)})
    self.append(contentsOf: filteredList)
  }
  
}