DE.FIRST
          Returns the first element in the specified dimension.
         
         Syntax
DE.FIRST(Dimension)
Example
The first element in the MEASURE dimension is Gross Margin, so this example returns Gross Margin:
DE.FIRST('MEASURE')
DE.FIRST(Dimension)
The first element in the MEASURE dimension is Gross Margin, so this example returns Gross Margin:
DE.FIRST('MEASURE')