func (file *File) Expand(oDataExpand string) *File {
	file.modifiers.AddExpand(oDataExpand)
	return file
}
Expand adds $expand OData modifier
package api
import (
	"encoding/json"
)
func (file *File) Conf(config *RequestConfig) *File {
	file.config = config
	return file
}
func (file *File) Select(oDataSelect string) *File {
	file.modifiers.AddSelect(oDataSelect)
	return file
}