How to use the fbjs/lib/emptyFunction.thatReturnsTrue function in fbjs

if (!event) {
      return;
    }

    if (event.stopPropagation) {
      event.stopPropagation();
    } else if (typeof event.cancelBubble !== 'unknown') {
      // The ChangeEventPlugin registers a "propertychange" event for
      // IE. This event does not support bubbling or cancelling, and
      // any references to cancelBubble throw "Member not found".  A
      // typeof check of "unknown" circumvents this issue (and is also
      // IE specific).
      event.cancelBubble = true;
    }

    this.isPropagationStopped = emptyFunction.thatReturnsTrue;
  },

listeners(eventType: String): Array /* TODO: Array */ {
    var subscriptions = this._subscriber.getSubscriptionsForType(eventType);
    return subscriptions
      ? subscriptions.filter(emptyFunction.thatReturnsTrue).map(
          function(subscription) {
            return subscription.listener;
          })
      : [];
  }

if (!event) {
          return;
        }

        if (event.stopPropagation) {
          event.stopPropagation();
        } else if (typeof event.cancelBubble !== "unknown") {
          // The ChangeEventPlugin registers a "propertychange" event for
          // IE. This event does not support bubbling or cancelling, and
          // any references to cancelBubble throw "Member not found".  A
          // typeof check of "unknown" circumvents this issue (and is also
          // IE specific).
          event.cancelBubble = true;
        }

        this.isPropagationStopped = emptyFunction.thatReturnsTrue;
      },

preventDefault: function() {
        this.defaultPrevented = true;
        var event = this.nativeEvent;
        if (!event) {
          return;
        }

        if (event.preventDefault) {
          event.preventDefault();
        } else if (typeof event.returnValue !== "unknown") {
          event.returnValue = false;
        }
        this.isDefaultPrevented = emptyFunction.thatReturnsTrue;
      },

if (normalize) {
      this[propName] = normalize(nativeEvent);
    } else {
      if (propName === 'target') {
        this.target = nativeEventTarget;
      } else {
        this[propName] = nativeEvent[propName];
      }
    }
  }

  var defaultPrevented = nativeEvent.defaultPrevented != null
    ? nativeEvent.defaultPrevented
    : nativeEvent.returnValue === false;
  if (defaultPrevented) {
    this.isDefaultPrevented = emptyFunction.thatReturnsTrue;
  } else {
    this.isDefaultPrevented = emptyFunction.thatReturnsFalse;
  }
  this.isPropagationStopped = emptyFunction.thatReturnsFalse;
  return this;
}

preventDefault: function () {
    this.defaultPrevented = true;
    var event = this.nativeEvent;
    if (!event) {
      return;
    }

    if (event.preventDefault) {
      event.preventDefault();
    } else if (typeof event.returnValue !== 'unknown') {
      event.returnValue = false;
    }
    this.isDefaultPrevented = emptyFunction.thatReturnsTrue;
  },

persist: function () {
    this.isPersistent = emptyFunction.thatReturnsTrue;
  },

persist: function () {
    this.isPersistent = emptyFunction.thatReturnsTrue;
  },

propKey +
                '` is only supported with multiline.',
            );
            warning(false, '%s', error.stack);
          }
        }
      }
      textContainer = (
        
      );
    } else {
      let children = props.children;
      let childCount = 0;
      React.Children.forEach(children, () => ++childCount);
      invariant(
        !(props.value && childCount),
        'Cannot specify both value and children.',
      );
      if (childCount >= 1) {
        children = (

preventDefault: function () {
    this.defaultPrevented = true;
    var event = this.nativeEvent;
    if (process.env.NODE_ENV !== 'production') {
      process.env.NODE_ENV !== 'production' ? warning(event, 'This synthetic event is reused for performance reasons. If you\'re ' + 'seeing this, you\'re calling `preventDefault` on a ' + 'released/nullified synthetic event. This is a no-op. See ' + 'https://fb.me/react-event-pooling for more information.') : undefined;
    }
    if (!event) {
      return;
    }

    if (event.preventDefault) {
      event.preventDefault();
    } else {
      event.returnValue = false;
    }
    this.isDefaultPrevented = emptyFunction.thatReturnsTrue;
  },