Create Json With Groovy

createJson.JSON

def content = [:];
	content.expand = 'schema,names';
 	content.startAt = 0;
 	content.maxResults = 500
 	content.total= 7
 	content.issues =[:];
 	content.issues = list
 	def jsonContent = new groovy.json.JsonBuilder(content);
 	println 'JSON : ' +jsonContent.toString() 
 	
Result:

{
    content: {
        expand: "schema,names",
        startAt: 0,
        maxResults: 500,
        total: 7,
        issues: []
    }
}