How to use a json metadata store with Biml

JsonShredder.biml

<Biml xmlns="http://schemas.varigence.com/biml.xsd">
<#
// Given the following structure
///{
///  "packages": [
///    "p1",
///    "p2",
///    "p3"
///  ]
///}

// Assume the json file is located as specified
string sourceFile = @"C:\ssisdata\trivial.json";

// Read the data into a string variable
string json = System.IO.File.ReadAllText(sourceFile);

// Deserialize the json into a dictionary of strings (packages) and a list of strings (p1, p2, p3)
Dictionary<string, List<string>> metadata = JsonConvert.DeserializeObject<Dictionary<string, List<string>>>(json);
#>
<Packages>
<#
// Shred the dictionary for our values
foreach (string item in metadata["packages"])
{
    //WriteLine(String.Format("<!-- {0} -->", item));
#>
	<Package Name="<#=item #>" />
<#
}
#>	
</Packages>
</Biml>
<#@ import namespace="Newtonsoft.Json" #>
<#* Assuming we have GAC'ed the assembly *#>
<#@ assembly name= "Newtonsoft.Json.dll" #>