question: returns an unmodifiable version of the given non-null doublelistiterator . concode_field_sep DoubleListIterator EMPTY_DOUBLE_LIST_ITERATOR concode_elem_sep DoubleIterator EMPTY_DOUBLE_ITERATOR concode_elem_sep DoubleList EMPTY_DOUBLE_LIST concode_field_sep DoubleList unmodifiableDoubleList concode_elem_sep DoubleList getEmptyDoubleList concode_elem_sep DoubleIterator singletonDoubleIterator concode_elem_sep DoubleList singletonDoubleList concode_elem_sep DoubleIterator unmodifiableDoubleIterator concode_elem_sep DoubleIterator getEmptyDoubleIterator concode_elem_sep DoubleListIterator singletonDoubleListIterator concode_elem_sep DoubleListIterator getEmptyDoubleListIterator
target: DoubleListIterator function ( DoubleListIterator arg0 ) { if ( null == arg0 ) { throw new NullPointerException ( ) ; } return UnmodifiableDoubleListIterator . wrap ( arg0 ) ; }