question: return true if this interval contains the interval ` y ' . concode_field_sep double hi concode_elem_sep double lo concode_field_sep double hi concode_elem_sep boolean interiorContains concode_elem_sep boolean interiorContains concode_elem_sep double getCenter concode_elem_sep double lo concode_elem_sep boolean intersects concode_elem_sep boolean isEmpty concode_elem_sep R1Interval union concode_elem_sep boolean approxEquals concode_elem_sep boolean approxEquals concode_elem_sep R1Interval addPoint concode_elem_sep R1Interval empty concode_elem_sep R1Interval fromPointPair concode_elem_sep R1Interval expanded concode_elem_sep int hashCode concode_elem_sep R1Interval intersection concode_elem_sep boolean equals concode_elem_sep double getLength concode_elem_sep String toString concode_elem_sep boolean interiorIntersects concode_elem_sep R1Interval fromPoint
target: boolean function ( R1Interval arg0 ) { if ( arg0 . isEmpty ( ) ) { return true ; } return arg0 . lo ( ) >= lo ( ) && arg0 . hi ( ) <= hi ( ) ; }