public GeoHaystackSearchArgs SetAdditionalField<TDocument, TMember>(
	Expression<Func<TDocument, TMember>> memberExpression,
	TMember value
)

Public Function SetAdditionalField(Of TDocument, TMember) ( 
	memberExpression As Expression(Of Func(Of TDocument, TMember)),
	value As TMember
) As GeoHaystackSearchArgs

member SetAdditionalField : 
        memberExpression : Expression<Func<'TDocument, 'TMember>> * 
        value : 'TMember -> GeoHaystackSearchArgs