Methods
# inner initSessionStorage(itemToCheckFor, valueToInitTo)
        Checks if the passed item already exists in the session storage and initializes it with given value if not existing.
    
    
    Parameters:
| Name | Type | Description | 
|---|---|---|
| itemToCheckFor | String | Selected item in the session storage that will be checked | 
| valueToInitTo | String | Value to initialize to if the item is not existing in session storage yet. |