dist/rollup-plugin-typescript2.cjs.js
function baseKeys(object) {
  if (!_isPrototype(object)) {
    return _nativeKeys(object);
  }
  var result = [];
  for (var key in Object(object)) {
    if (hasOwnProperty$7.call(object, key) && key != 'constructor') {
      result.push(key);
    }
  }
  return result;
}
function baseKeys(object) {
  if (!_isPrototype(object)) {
    return _nativeKeys(object);
  }
  var result = [];
  for (var key in Object(object)) {
    if (hasOwnProperty$7.call(object, key) && key != 'constructor') {
      result.push(key);
    }
  }
  return result;
}
function baseKeys ( object ) { if ( ! _isPrototype ( object ) ) { return _nativeKeys ( object ) ; } var result = [ ] ; for ( var key in Object ( object ) ) { if ( hasOwnProperty$7 . call ( object , key ) && key != 'constructor' ) { result . push ( key ) ; } } return result ; }
The base implementation of `_.keys` which doesn't treat sparse arrays as dense.

@private
@param {Object} object The object to query.
@returns {Array} Returns the array of property names.
The base implementation of _ . keys which doesn t treat sparse arrays as dense .