I'm writing my plugin / patch. Need help

{
	"type": "config",
	"id": "conf.mydev.devinputs",
	"title": "DEV inputs",
	"queryinfo": {
		"xpath": "//mydev/devinputs/devinput",
		"iterable": true,
		"idproperty": "iddev"
	},
	"properties": {
		"iddev": {
			"type": "integer"
		},
		"number": {
			"type": "string"
		},
		"name": {
			"type": "string"
		},
		"enable": {
			"type": "boolean",
			"default": false
		}
	}
}

<?php
namespace Engined\Rpc;


class DevInputs extends \OMV\Rpc\ServiceAbstract {
	public function getName() {
		return "DevInputs";
	}


	public function initialize() {
		$this->registerMethod("getDev");
		$this->registerMethod("setDev"); 
	}


	function getDev($params, $context) {
		$this->validateMethodContext($context, [
			"role" => OMV_ROLE_ADMINISTRATOR
		]);


		//$this->validateMethodParams($params, "rpc.mydev.devinputs");


		$db = \OMV\Config\Database::getInstance();


		return $db->getAssoc("conf.mydev.devinputs");
	}


	function setDev($params, $context) {


		$this->validateMethodContext($context, [
			"role" => OMV_ROLE_ADMINISTRATOR
		]);
		$object = new \OMV\Config\ConfigObject(
		  "conf.mydev.devinputs");
		$object->setAssoc($params);


		$db = \OMV\Config\Database::getInstance();
		$db->set($object);
		\OMV\Rpc\Rpc::call("Config", "applyChanges", [
			"modules" => [ "apt" ],
			"force" => TRUE
		], $context);
	}
}

Ext.define("OMV.module.admin.mydev.Dev_inputs", {
	extend: "OMV.workspace.grid.Panel",


	requires: [
		"OMV.data.Store", 
		"OMV.data.Model",
		"OMV.data.proxy.Rpc"
	],


	hideAddButton: true,
	hideEditButton: true,
	hideDeleteButton: true,
	hideApplyButton: false,
	hideRefreshButton: false,




	autoReload: false,
	stateful: true, 
	stateId: "dev-inputs",
	plugins:[{
        ptype:'cellediting',
        clicksToEdit: 1
    }],
	columns: [{
		text: _("Number"),
		sortable: false,
		dataIndex: "number",
		stateId: "number",
		flex: 1
	},{
		xtype: "textcolumn",
		text: _("Name"),
		sortable: true,
		dataIndex: "name",
		stateId: "name",
		flex: 1,
		editor: {
                xtype: 'textfield',
                allowBlank: false
            }
	},{
		xtype: "enabledcolumn",
		text: _("Status"),
		dataIndex: "enable",
		stateId: "status"
	},{
		xtype: "checkcolumn",
		text: _("Enable"),
		dataIndex: "enable",
		stateId: "enable",
		flex: 1
	}],


	onCheckButton: function() {
		 this.onApplyButton();
	},


	onApplyButton: function() {
		var me = this;
		var params = me.getValues();
		OMV.Rpc.request({
			scope: me,
			relayErrors: false,
			rpcData: {
				service: "DevInputs",
				method: "setDev",
				params: params
			}
		});
	},




	initComponent: function() {
		var me = this;
		me.store = Ext.create("OMV.data.Store", {
			autoLoad: true,
			model: OMV.data.Model.createImplicit({
				idProperty: "iddev",
				fields: [
					{ name: "iddev", type: "int" },
					{ name: "number", type: "string" },
					{ name: "name", type: "string" },
					{ name: "enable", type: "boolean" }
				]
			}),
			proxy: {
				type: "rpc",
				appendSortParams: false,
				rpcData: {
					service: "DevInputs",
					method: "getDev"
				}
			},
			sorters: [{
				direction: "ASC",
				property: "iddev"
			}]
		});
		me.callParent(arguments);
	}
});


OMV.WorkspaceManager.registerNode({
	id: "dev_inputs",
	path: "/mydev",
	text: _("DEV inputs"),
	iconCls: "mdi mdi-star"
});


OMV.WorkspaceManager.registerPanel({
	id: "dev_inputs",
	path: "/mydev/dev_inputs",
	text: _("DEV inputs"),
	position: 10,
	className: "OMV.module.admin.mydev.Dev_inputs"
});

<?xml version="1.0" encoding="UTF-8"?>
<config>
  <!-- Configuration version -->
  <version>0.1</version>
  <mydev>
    <devinputs>
      <devinput>
          <iddev>1</iddev>
          <number>1.1</number>
          <name>DEV 1.1</name>
          <enable>0</enable>
      </devinput>
      <devinput>
          <iddev>2</iddev>
          <number>1.2</number>
          <name>DEV 1.2</name>
          <enable>0</enable>
      </devinput>
    </devinputs>
  </mydev>
  <!-- System configuration - Do not add any configuration here -->
  <system>
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