index
Gets the index of the provided public key.
This function retrieves the index of a specified public key within the MultiKey. If the public key does not exist, it throws an error.
Return
The corresponding index of the public key, if it exists.
Parameters
public
The public key to find the index for. Can be any type whose toString() representation matches one in the publicKeys list.
Throws
If the public key is not found in the MultiKey.