[Ant Design For React] where does the form prop of Component that uses Form components come from?

the following is a React Component: that uses the Form component

import { Form, Icon, Input, Button } from "antd";
const FormItem = Form.Item;
...

class HorizontalLoginForm extends React.Component {
  componentDidMount() {
    this.props.form.validateFields();
  }
  ...
}

the complete code can be found in here

notice the sentence this.props.form . Where did this form prop come from?

Mar.20,2021

@Form.create()
class HorizontalLoginForm extends React.Component {}
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MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b34dad-2bf3d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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