Encapsulate getter into an extractorProperty structure

	return osTypes

}

// Given a struct value, access a field within that struct (or one of its embedded

// structs).

// Given a set of properties (struct value), return the value of the field within that

// struct (or one of its embedded structs).

type fieldAccessorFunc func(structValue reflect.Value) reflect.Value

// A property that can be optimized by the commonValueExtractor.

type extractorProperty struct {

	// Retrieves the value on which common value optimization will be performed.

	getter fieldAccessorFunc

	// The empty value for the field.

	emptyValue reflect.Value

}

// Supports extracting common values from a number of instances of a properties

// structure into a separate common set of properties.

type commonValueExtractor struct {

	// The getters for every field from which common values can be extracted.

	fieldGetters []fieldAccessorFunc

	// The properties that the extractor can optimize.

	properties []extractorProperty

}

// Create a new common value extractor for the structure type for the supplied

			// Gather fields from the embedded structure.

			e.gatherFields(field.Type, fieldGetter)

		} else {

			e.fieldGetters = append(e.fieldGetters, fieldGetter)

			property := extractorProperty{

				fieldGetter,

				reflect.Zero(field.Type),

			}

			e.properties = append(e.properties, property)

		}

	}

}

	sliceValue := reflect.ValueOf(inputPropertiesSlice)

	for _, fieldGetter := range e.fieldGetters {

	for _, property := range e.properties {

		fieldGetter := property.getter

		// Check to see if all the structures have the same value for the field. The commonValue

		// is nil on entry to the loop and if it is nil on exit then there is no common value,

		// otherwise it points to the common value.

		// If the fields all have a common value then store it in the common struct field

		// and set the input struct's field to the empty value.

		if commonValue != nil {

			emptyValue := reflect.Zero(commonValue.Type())

			emptyValue := property.emptyValue

			fieldGetter(commonStructValue).Set(*commonValue)

			for i := 0; i < sliceValue.Len(); i++ {

				container := sliceValue.Index(i).Interface().(propertiesContainer)