Where can be found all MenuProps attributes of a Select in Material UI

Having the next Material UI Select, I've found that one can modify its behavior and appearence.

import React from "react";
import MenuItem from "@material-ui/core/MenuItem";
import Select from "@material-ui/core/Select";

class SimpleSelect extends React.Component {
  state = {
    age: 10
  };

  handleChange = event => {
    this.setState({ [event.target.name]: event.target.value });
  };

  render() {
    return (
      <Select
        value={this.state.age}
        onChange={this.handleChange}
        inputProps={{
          name: "age",
          id: "age-simple"
        }}
      >
        <MenuItem value="">
          <em>None</em>
        </MenuItem>
        <MenuItem value={10}>Ten</MenuItem>
        <MenuItem value={20}>Twenty</MenuItem>
        <MenuItem value={30}>Thirty</MenuItem>
      </Select>
    );
  }
}

export default SimpleSelect;

This is the above one with MenuProps added, also a sandbox where I'm playing with it.

import React from "react";
import MenuItem from "@material-ui/core/MenuItem";
import Select from "@material-ui/core/Select";

class SimpleSelect extends React.Component {
  state = {
    age: 10
  };

  handleChange = event => {
    this.setState({ [event.target.name]: event.target.value });
  };

  render() {
    return (
      <Select
        value={this.state.age}
        onChange={this.handleChange}
        inputProps={{
          name: "age",
          id: "age-simple"
        }}
        MenuProps={{
          anchorOrigin: {
            vertical: "bottom",
            horizontal: "left"
          },
          transformOrigin: {
            vertical: "top",
            horizontal: "left"
          },
          getContentAnchorEl: null
        }}
      >
        <MenuItem value="">
          <em>None</em>
        </MenuItem>
        <MenuItem value={10}>Ten</MenuItem>
        <MenuItem value={20}>Twenty</MenuItem>
        <MenuItem value={30}>Thirty</MenuItem>
      </Select>
    );
  }
}

export default SimpleSelect;

My question is: where can I find all the possible attributes (like anchorOrigin, transformOrigin, etc) available for it?

I want to make the dropdown wider and also to add checkboxes for each dropdown item but I don't know what MenuProps attributes to access.