CodeMod: Insert import react-addons-pure-render-mixin after import react

test.js

import React from 'react';
import Immutable from 'immutable';
import classnames from 'classnames';

transformer.js

export default function transformer(file, api) {
  const j = api.jscodeshift;

  const pureRenderMixinImport = j.importDeclaration(
    [j.importDefaultSpecifier(
        j.identifier("PureRenderMixin")
    )],
    j.literal("react-addons-pure-render-mixin")
  );

  return j(file.source)
    .find(j.ImportDeclaration, {
      type: "ImportDeclaration",
      source: {
        type: "Literal",
        value: "react"
      }
    })
    .forEach(p => {
      j(p).insertAfter(pureRenderMixinImport);
    }).toSource()
};