Function mint 

pub fn mint<T: Config>(
    collection: CollectionId,
    item: ItemIndex,
    to: T::AccountId,
    metadata: Vec<(MetadataKeyOf<T>, MetadataValueOf<T>)>,
)

Mint an instance of an immutable item definition into an empty purse key.

The destination gives no consent; any empty key is a valid target. See the module documentation on purse-key occupancy.

metadata contains instance-specific overrides. Item metadata remains the shared default for every instance minted from the definition.

Warning: Doc-Only

This function is an automatically generated, and is doc-only, uncallable stub. See the real version in Pallet::mint.