You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: deserializers.go
    path of file: ./repos/aws-sdk-go-v2/service/fis
    
    the code of the file until where you have to start completion: // Code generated by smithy-go-codegen DO NOT EDIT.

package fis

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"github.com/aws/aws-sdk-go-v2/aws/protocol/restjson"
	"github.com/aws/aws-sdk-go-v2/service/fis/types"
	smithy "github.com/aws/smithy-go"
	smithyio "github.com/aws/smithy-go/io"
	"github.com/aws/smithy-go/middleware"
	"github.com/aws/smithy-go/ptr"
	smithytime "github.com/aws/smithy-go/time"
	smithyhttp "github.c
    
func awsRestjson1_deserializeDocumentExperimentTemplateActionParameterMap(v *map[string]string, value interface{}) error {
	if v == nil {
		return fmt.Errorf("unexpected nil of type %T", v)
	}
	if value == nil {
		return nil
	}

	shape, ok := value.(map[string]interface{})
	if !ok {
		return fmt.Errorf("unexpected JSON type %v", value)
	}

	var mv map[string]string
	if *v == nil {
		mv = map[string]string{}
	} else {
		mv = *v
	}

	for key, value := range shape {
		var parsedVal string
		if value != nil {
			jtv, ok := value.(string)
			if !ok {
				return fmt.Errorf("expected ExperimentTemplateActionParameter to be of type string, got %T instead", value)
			}
			parsedVal = jtv
		}
		mv[key] = parsedVal

	}
	*v = mv
	return nil
}