add sequence protocol function signatures
add sequence protocol function signatures

iamrekcah/clay,jckarter/clay,iamrekcah/clay,mario-campos/clay,iamrekcah/clay,jckarter/clay,iamrekcah/clay,jckarter/clay,iamrekcah/clay,mario-campos/clay,jckarter/clay,mario-campos/clay,jckarter/clay,mario-campos/clay,mario-campos/clay,jckarter/clay