how do we verify using revit api whether element is dimensioned or not?

[prasannamurumkar]

How do we get verify dimension on elemnt are given or not?

[prasannamurumkar]

As in attached file dimension on the elements

some measured from centre of element which is denoted by dot.

Some are measured from end of element which is denoted by line..

how do we differentiate this using revit api?