}
	}

	var buf bytes.Buffer

	var expr string
	if x.expr != nil {
		expr = ExprString(x.expr)
	} else {
		switch x.mode {
		case builtin:
			expr = predeclaredFuncs[x.id].name
		case typexpr:
			expr = TypeString(x.typ, qf)
		case constant_:
			expr = x.val.String()
		}
	}

	// <expr> (
	if expr != "" {
		buf.WriteString(expr)
		buf.WriteString(" (")
	}

        data class Failed(val errors: Collection<DocumentError>) : ExprConversion
    }


    private
    fun exprToValue(expr: Expr): ExprConversion = when (expr) {
        is Literal<*> -> ExprConversion.Converted(literalNode(expr))
        is FunctionCall -> run {
            val errors = mutableListOf<DocumentError>()

                && value.getClass().getName().startsWith("java.lang."));
    }

    private String stripTokens(String expr) {
        if (expr.startsWith("${") && (expr.indexOf('}') == expr.length() - 1)) {
            expr = expr.substring(2, expr.length() - 1);
        }
        return expr;
    }

    @Override
    public File alignToBaseDirectory(File file) {

		}
	}

	var buf bytes.Buffer

	var expr string
	if x.expr != nil {
		expr = ExprString(x.expr)
	} else {
		switch x.mode {
		case builtin:
			expr = predeclaredFuncs[x.id].name
		case typexpr:
			expr = TypeString(x.typ, qf)
		case constant_:
			expr = x.val.String()
		}
	}

	// <expr> (
	if expr != "" {
		buf.WriteString(expr)
		buf.WriteString(" (")
	}

               },
               "expr": "sum by (pod) (\n  container_memory_working_set_bytes{container=\"discovery\", pod=~\"istiod-.*\"}\n)",
               "legendFormat": "Container ({{pod}})"
            },
            {
               "datasource": {
                  "type": "prometheus",
                  "uid": "$datasource"
               },

    internal.istio.io/parents: Gateway/gateway/slctr-expr-notin-yes.istio-system
  creationTimestamp: null
  name: gateway-istio-autogenerated-k8s-gateway-slctr-expr-notin-yes
  namespace: istio-system
spec:
  servers:
  - hosts:
    - default/*.slctr-expr-notin-yes.example
    - group-namespace1/*.slctr-expr-notin-yes.example
    - group-namespace2/*.slctr-expr-notin-yes.example

                && value.getClass().getName().startsWith("java.lang."));
    }

    private String stripTokens(String expr) {
        if (expr.startsWith("${") && (expr.indexOf('}') == expr.length() - 1)) {
            expr = expr.substring(2, expr.length() - 1);
        }
        return expr;
    }

    @Override
    public File alignToBaseDirectory(File file) {

import org.codehaus.groovy.ast.expr.ArgumentListExpression;
import org.codehaus.groovy.ast.expr.BinaryExpression;
import org.codehaus.groovy.ast.expr.ClosureExpression;
import org.codehaus.groovy.ast.expr.ConstantExpression;
import org.codehaus.groovy.ast.expr.ConstructorCallExpression;
import org.codehaus.groovy.ast.expr.DeclarationExpression;
import org.codehaus.groovy.ast.expr.ElvisOperatorExpression;

         "pluginVersion": "v11.0.0",
         "targets": [
            {
               "datasource": {
                  "type": "prometheus",
                  "uid": "$datasource"
               },
               "expr": "sum by (cluster, namespace, job) (\n    rate(\n        process_cpu_seconds_total{\n            cluster=~\"$cluster\",\n            namespace=~\"$namespace\",\n            job=~\"$job\"\n        }\n    [$__rate_interval])\n)\n",

func (check *Checker) singleIndex(expr *typeparams.IndexExpr) ast.Expr {
	if len(expr.Indices) == 0 {
		check.errorf(expr.Orig, InvalidSyntaxTree, "index expression %v with 0 indices", expr)
		return nil
	}
	if len(expr.Indices) > 1 {
		// TODO(rFindley) should this get a distinct error code?
		check.error(expr.Indices[1], InvalidIndex, invalidOp+"more than one index")
	}
	return expr.Indices[0]
}