haskeys(x, ...)setvalues(x, ...)
getvalues(x, ...)
# S3 method for xhash
getvalues(x, states, ...)
# S3 method for xhash
setvalues(x, states, values, ...)
# S3 method for xhash
haskeys(x, states, ...)
haskeys returns a logical vector
setvalues returns a reference to the object
getvalues returns a list of values