code: function(path) {
    var importSource = path.node.source.value;
    var defaultSpecifier = path.get('specifiers')[0];
    defaultSpecifier.assertImportDefaultSpecifier();
  
    path.replaceWith(
      buildImportAssignment(
        defaultSpecifier.get('local').get('name').node,
        importSource
      )
    );
  }
docs: /*
  before
  import curryN from './curryN';
  
  after
  var curryN = require('./curryN');