'nullable|integer', 'field_name' => 'required|string|max:255', 'field_type' => 'required|in:textbox,number,dropdown,checkbox,date,textarea', 'is_required' => 'nullable|boolean', 'default_value' => 'nullable|string', 'placeholder' => 'nullable|string|max:255', 'display_condition' => 'nullable|array', 'validation_rules' => 'nullable|array', 'options' => 'nullable|array', 'properties' => 'nullable|array', ]; } }