question: returns the length of the range . concode_field_sep long serialVersionUID concode_elem_sep double lower concode_elem_sep double upper concode_field_sep Range expandToInclude concode_elem_sep boolean intersects concode_elem_sep boolean intersects concode_elem_sep Range shift concode_elem_sep Range shift concode_elem_sep Range scale concode_elem_sep double getUpperBound concode_elem_sep double constrain concode_elem_sep double shiftWithNoZeroCrossing concode_elem_sep boolean contains concode_elem_sep Range expand concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep double getCentralValue concode_elem_sep String toString concode_elem_sep double getLowerBound concode_elem_sep Range combine
target: double function ( ) { return this . upper - this . lower ; }