# SchemaInitializer
Used for the initialization of various schemas. Newly added schema can be inserted anywhere in an existing schema node, including:
```ts
{
properties: {
// beforeBegin - Insert in front of the current node
node1: {
properties: {
// afterBegin - Insert in front of the first child node of the current node
// ...
// beforeEnd - After the last child node of the current node
},
},
// afterEnd - After the current node
},
}
```
The core of SchemaInitializer includes `` and `` the two components. `` is used to create the dropdown menu button of schema, and the options of the dropdown menu is ``.
### ``
### ``
### ``