+++
# -----------------------------------------------------------------------
# Do not edit this file. It is automatically generated by API Documenter.
# -----------------------------------------------------------------------
title = "Registry"
keywords = ["grafana","documentation","sdk","@grafana/data"]
type = "docs"
+++
## Registry class
Signature
```typescript
export declare class Registry
```
Import
```typescript
import { Registry } from '@grafana/data';
```
Constructors
| Constructor | Modifiers | Description |
| --- | --- | --- |
| [constructor(init)](#constructor-init) | | Constructs a new instance of the Registry class |
Properties
| Property | Modifiers | Type | Description |
| --- | --- | --- | --- |
| [setInit](#setinit-property) | | (init: () => T[]) => void | |
Methods
| Method | Modifiers | Description |
| --- | --- | --- |
| [get(id)](#get-method) | | |
| [getIfExists(id)](#getifexists-method) | | |
| [isEmpty()](#isempty-method) | | |
| [list(ids)](#list-method) | | Return a list of values by ID, or all values if not specified |
| [register(ext)](#register-method) | | |
| [selectOptions(current, filter)](#selectoptions-method) | | |
### constructor(init)
Constructs a new instance of the `Registry` class
Signature
```typescript
constructor(init?: (() => T[]) | undefined);
```
Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| init | (() => T[]) | undefined | |
### setInit property
Signature
```typescript
setInit: (init: () => T[]) => void;
```
### get method
Signature
```typescript
get(id: string): T;
```
Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| id | string | |
Returns:
`T`
### getIfExists method
Signature
```typescript
getIfExists(id: string | undefined): T | undefined;
```
Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| id | string | undefined | |
Returns:
`T | undefined`
### isEmpty method
Signature
```typescript
isEmpty(): boolean;
```
Returns:
`boolean`
### list method
Return a list of values by ID, or all values if not specified
Signature
```typescript
list(ids?: any[]): T[];
```
Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| ids | any[] | |
Returns:
`T[]`
### register method
Signature
```typescript
register(ext: T): void;
```
Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| ext | T | |
Returns:
`void`
### selectOptions method
Signature
```typescript
selectOptions(current?: string[], filter?: (ext: T) => boolean): RegistrySelectInfo;
```
Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| current | string[] | |
| filter | (ext: T) => boolean | |
Returns:
`RegistrySelectInfo`