public PsiBinaryExpressionPattern operation(final ElementPattern pattern) {
    return with(new PatternCondition<PsiBinaryExpression>("operation") {
      @Override
      public boolean accepts(@NotNull final PsiBinaryExpression psiBinaryExpression, final ProcessingContext context) {
        return pattern.accepts(psiBinaryExpression.getOperationSign(), context);
      }
    });
  }
public PsiBinaryExpressionPattern operation(final ElementPattern pattern)