An optional list of source attributes that provide data for this index field. If not specified, the data is pulled from a source attribute
            with the same name as this IndexField. When one or more source attributes are specified, an optional data transformation can be
            applied to the source data when populating the index field. You can configure a maximum of 20 sources for an IndexField.
             
            
 Declaration Syntax
 Declaration Syntax| C# | 
public List<SourceAttribute> SourceAttributes { get; set; }