Metered class

Provides methods to set metered key.

The Metered type exposes the following members:

Constructors

Constructor	Description
`__init__`	Initializes a new instance of this class.

Method	Description
`set_metered_key`	Sets metered public and private key
`get_consumption_quantity`	Gets consumption file size
`get_consumption_credit`	Gets consumption credit
`is_metered_licensed`	Check whether metered is licensed

In this example, an attempt will be made to set metered public and private key