Bug 210716 Support switch Text/Chart view in crosstab cell
Need crosstab UI provide support to switch between Text and Chart view in measure/aggregation cell.
xtab/org.eclipse.birt.report.item.crosstab.core/src/org/eclipse/birt/report/item/crosstab/core/de/internal/CrosstabModelUtil.java
colLevel = colLevelHandle.getCubeLevelName( );
					}
					if ( isMeasureHorizontal )
					{
						
						return crosstabItem.getMeasure( 0 )
								.getAggregationCell( rowDimension,
										rowLevel,
										colDimension,
										colLevel );
					}
					else
					{
						
						for ( int i = 0; i < crosstabItem.getMeasureCount( ); i++ )
						{
							CrosstabCellHandle aggCell = crosstabItem.getMeasure( i )
									.getAggregationCell( rowDimension,
											rowLevel,
											colDimension,
											colLevel );
							if ( aggCell != null )
							{
								return aggCell;
							}
						}
					}
				}
				
				return crosstabItem.getMeasure( 0 ).getCell( );