src/BaseSchema.php
public function set($property_name, $value)
    {
        $this->validateProperty($property_name, $value);
        $this->data[$property_name] = $value;
        return $this;
    }
public function set($property_name, $value)
    {
        $this->validateProperty($property_name, $value);
        $this->data[$property_name] = $value;
        return $this;
    }
Pattern property setter

@param $property_name
@param $value
@return $this
@throws \Exception