Variables parsing in VariableGroup

Currently this is how variables in VariableGroup are parsed

type VariableGroup struct {
        .....
	// Gets or sets variables contained in the variable group.
	Variables **map[string]interface{} `json:"variables,omitempty"`
}

In order to get the value of a specific variable, we need to some type assertion:

for key, variable := range *variableGroup.Variables {
		value := variable.(map[string]interface{})["value"]
		log.Printf("Variable Name: %v, Value: %v", key, value)
}

Could we not do this instead?

type VariableGroup struct {
        .....
	// Gets or sets variables contained in the variable group.
	Variables *map[string]map[string]interface{} `json:"variables,omitempty"`
}

Therefore we could get the value, this way:

for key, variable := range *variableGroup.Variables {
		vari := variable["value"]
		log.Printf("Variable Name: %v, Value: %v", key, vari)
}

Start by locating the VariableGroup definition and inspecting its current Variables type and usages. Compare the proposed nested map type with the JSON shape and existing consumers, then verify that variable access still works across the relevant API models and tests.