Model/PropertySet.php
public function addPropertyResponse($item)
    {
        if (!($item instanceof PropertyResponse)) {
            if (is_array($item)) {
                try {
                    $item = new PropertyResponse($item);
                } catch (\Exception $e) {
                    trigger_error('Could not auto-instantiate PropertyResponse. ' . $e->getMessage(), E_USER_WARNING);
                }
            } else {
                trigger_error('Array parameter item is not of expected type "PropertyResponse"!', E_USER_WARNING);
            }
        }
        $this->properties[] = $item;

        return $this;
    }
public function addPropertyResponse($item)
    {
        if (!($item instanceof PropertyResponse)) {
            if (is_array($item)) {
                try {
                    $item = new PropertyResponse($item);
                } catch (\Exception $e) {
                    trigger_error('Could not auto-instantiate PropertyResponse. ' . $e->getMessage(), E_USER_WARNING);
                }
            } else {
                trigger_error('Array parameter item is not of expected type "PropertyResponse"!', E_USER_WARNING);
            }
        }
        $this->properties[] = $item;

        return $this;
    }
Adds an object of "Properties" of the PropertySet.

@param PropertyResponse|array $item

@return PropertySet