setProp(target, props) {
    for (let prop in props) {
      if (target.hasOwnProperty(prop)) {
        target[prop] = Span.getSpanValue(props[prop]);
      }
    }

    return target;
  }
set the prototype in a given prototypeObject

@memberof Proton#Proton.Util
@method setProp

@todo add description for param `target`
@todo translate desription from chinese to english

@param {Object} target
@param {Object} prototypeObject An object of single prototypes

@return {Object} target