Issue accesing variable inside script in ActiveChoice plugin (ver2.4)

[chencho m-a]

Hi all, 

I have a script which is writting the configuration of ActiveChoice instead of use the browser. 

So I am sending a hashmap as parameters but I am unable to acces it inside the script 

def components_param(hash_map){ // Section header

    return [$class: 'DynamicReferenceParameter',

            choiceType: 'ET_FORMATTED_HTML', 

            description: '', 

            name: '', 

            randomName: "choice-parameter-${UUID.randomUUID()}",

            omitValueField: false,

            referencedParameters: 'sdk',

            script: [

                $class: 'GroovyScript',

                fallbackScript: [

                    classpath: [], sandbox: false, script: 'return ["Error,can\'t retrieve components"]',

                    ],

                script: [

                    classpath: [], sandbox: false, script:'''

def output="<font size='3'><b>Components to be updated ${sdk}</b></font><ul>"

for (comp in  '''+hash_map+'''[sdk].keySet()) {

        output += "<li>"+comp+"</li>"

}

output+="</ul>"

return output

            '''

                    ]

                ]                           

            ]

}

If I check the content in jenkins UI, i got this error:

startup failed:
Script1: 3: illegal colon after argument expression;
   solution: a complex label expression before a colon must be parenthesized @ line 3, column 43.

The hash_map in jenkins UI takes this form:

 [devel:[extensions:[extension1:[data:[name:name1, type:generic], sdk-ext:sdk-ext-extension1-devel,  extension1-release: extension1-sdk-1.21.0.0-devel, ...

How can I parse this hashmap inside ActiveChoice script? In any groovy console is something like:

sdks=hash_map.keySet()

sdk=sdks[1]

for (comp in hash_map[sdk].keySet()) {

    println comp

}

Any help will be appreciated