code: @SuppressWarnings("unchecked")
      public final Coalesce<T> coalesce(Expression<?>...exprs) {
          Coalesce<T> coalesce = new Coalesce<T>(getType(), mixin);
          for (Expression expr : exprs) {
              coalesce.add(expr);
          }
          return coalesce;
      }
docs: Create a {@code coalesce(this, exprs...)} expression
  
  @param exprs additional arguments
  @return coalesce