spyglass/src/main/java/com/linkedin/android/spyglass/ui/MentionsEditText.java
@Override
    public void removeTextChangedListener(TextWatcher watcher) {
        if (watcher == mInternalTextWatcher) {
            if (mIsWatchingText) {
                super.removeTextChangedListener(mInternalTextWatcher);
                mIsWatchingText = false;
            }
        } else {
            // Other watchers are added
            mExternalTextWatchers.remove(watcher);
        }
    }
@Override
    public void removeTextChangedListener(TextWatcher watcher) {
        if (watcher == mInternalTextWatcher) {
            if (mIsWatchingText) {
                super.removeTextChangedListener(mInternalTextWatcher);
                mIsWatchingText = false;
            }
        } else {
            // Other watchers are added
            mExternalTextWatchers.remove(watcher);
        }
    }
Removes a {@link TextWatcher} from this class. Note that this function servers as the
counterpart to {@link #addTextChangedListener(TextWatcher)}).

@param watcher the {@link TextWatcher} to remove