Group component
 Array component function can be realized through group component
  Example
  Array
   field example
   Configuration
  props
 | property |  Direction |  Type |  Default | 
 | rule |  The rule of nested components |  Object/Array |  - | 
 | field |  Only get this field in the sub-form, after setting, the value is Array\<field\> v2.5.0+ |  Number |  - | 
 | min |  Add at least a few items |  Number |  - | 
 | max |  Add up to a few items |  Number |  - | 
 | expand |  Expand several items by default |  Number |  - | 
 | button |  Whether to show operation buttons |  Boolean |  - | 
 | options |  Sub-form configuration |  Object |  - | 
 | fontSize |  Action button font size |  Number |  28 | 
 | disabled |  Disable |  Boolean |  false | 
  events
 | Event name |  Description |  return value | 
 | change |  Triggered after the value changes |  - | 
 | add |  Trigger after adding an item |  - | 
 | remove |  Triggered after deleting an item |  - | 
 | itemMounted |  Triggered after the new sub-form is initialized |  - | 
 [field-emitName] |  Subform emit event |  - |