docs: public static SimpleAttributeDefinitionBuilder create(final String name, final ModelNode node) {
          ModelType type = node.get(ModelDescriptionConstants.TYPE).asType();
          boolean nillable = node.get(ModelDescriptionConstants.NILLABLE).asBoolean(true);
          boolean expressionAllowed = node.get(ModelDescriptionConstants.EXPRESSIONS_ALLOWED).asBoolean(false);
          ModelNode defaultValue = nillable ? node.get(ModelDescriptionConstants.DEFAULT) : new ModelNode();
          return SimpleAttributeDefinitionBuilder.create(name, type, nillable)
                  .setDefaultValue(defaultValue)
                  .setAllowExpression(expressionAllowed);
      }