lib/protos.js
function isMixed(item) {
  if (!is.object(item)) return false;
  if (!is.string(item.key)) return false;
  if (!has.call(item, 'value')) return false;
  return true;
}
function isMixed(item) {
  if (!is.object(item)) return false;
  if (!is.string(item.key)) return false;
  if (!has.call(item, 'value')) return false;
  return true;
}
function isMixed ( item ) { if ( ! is . object ( item ) ) return false ; if ( ! is . string ( item . key ) ) return false ; if ( ! has . call ( item , 'value' ) ) return false ; return true ; }
Determine if item in mapping array is a valid "mixed" type value

Must be an object with properties "key" (of type string)
and "value" (of any type)

@api private
@param {*} item
@return {Boolean}
Determine if item in mapping array is a valid mixed type value