A convenience method, like object_group, but also reformats the Object’s object_id.
@return the previous sibling (nil if unset)
Returns the position that self holds in its parent’s array, indexed from 1.
This method is used inside of several different objects to determine if special behavior is needed in the constructor.
Special behavior is needed if the array passed in as args has true or false as its value, and if the second element of args is a hash.
Turns email_address into an OpenSSL::X509::Name
Retrieves the pre-configured API key key or terminates interaction with an error.
@return [Array<Vertex>] the vertices of {#graph} that have an edge with
`self` as their {Edge#destination}