Returns ranges of complex value parts
@returns {Array} Returns <code>null</code> if value is not complex
function(isAbsolute) {
			var parts = findParts(this.value());
			if (isAbsolute) {
				var offset = this.valuePosition(true);
				_.each(parts, function(p) {
					p.shift(offset);
				});
			}
			
			return parts;
		}