public static LocalItem make(CstString name, CstString signature) {
    if (name == null && signature == null) {
      return null;
    }

    return new LocalItem(name, signature);
  }
Make a new item. If both name and signature are null, null is returned.

<p>TODO: intern these

@param name {@code null-ok;} local variable name
@param signature {@code null-ok;} local variable signature
@return {@code non-null;} appropriate instance.
android/android_framework/dex-maker/src/main/java/com/android/dx/rop/code/LocalItem.java