library/src/main/java/com/evernote/android/job/JobManager.java
/**
     * Ensure that you've called {@link #create(Context)} first. Otherwise this method
     * throws an exception.
     *
     * @return The {@code JobManager} object.
     */
Ensure that you've called  #create(Context) first. Otherwise this method
throws an exception.

@return The  JobManager object.
Ensure that you ' ve called #create ( Context ) first . Otherwise this method throws an exception . @return The JobManager object .
public static JobManager instance() {
        if (instance == null) {
            synchronized (JobManager.class) {
                if (instance == null) {
                    throw new IllegalStateException("You need to call create() at least once to create the singleton");
                }
            }
        }
        return instance;
    }
public static JobManager instance ( ) { if ( instance == null ) { synchronized ( JobManager . class ) { if ( instance == null ) { throw new IllegalStateException ( "You need to call create() at least once to create the singleton" ) ; } } } return instance ; }
Ensure that you've called {@link #create(Context)} first.
Ensure that you ' ve called { @link #create ( Context ) } first .