@NotNull
  public Promise<List<? extends XLineBreakpointVariant>> computeVariantsAsync(@NotNull Project project, @NotNull XSourcePosition position) {
    return Promises.resolvedPromise(computeVariants(project, position));
  }
@NotNull
  public Promise<List<? extends XLineBreakpointVariant>> computeVariantsAsync(@NotNull Project project, @NotNull XSourcePosition position)