func (c *ApiService) FetchSupportingDocument(Sid string) (*NumbersV2SupportingDocument, error) {
	path := "/v2/RegulatoryCompliance/SupportingDocuments/{Sid}"
	path = strings.Replace(path, "{"+"Sid"+"}", Sid, -1)
	data := url.Values{}
	headers := make(map[string]interface{})
	resp, err := c.requestHandler.Get(c.baseURL+path, data, headers)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	ps := &NumbersV2SupportingDocument{}
	if err := json.NewDecoder(resp.Body).Decode(ps); err != nil {
		return nil, err
	}
	return ps, err
}
Fetch specific Supporting Document Instance.
package openapi
import (
	"encoding/json"
	"fmt"
	"net/url"
	"strings"
	"github.com/twilio/twilio-go/client"
)
type CreateSupportingDocumentParams struct {
	Attributes *map[string]interface{} `json:"Attributes,omitempty"`
	FriendlyName *string `json:"FriendlyName,omitempty"`
	Type *string `json:"Type,omitempty"`
}
func (params *CreateSupportingDocumentParams) SetAttributes(Attributes map[string]interface{}) *CreateSupportingDocumentParams {
	params.Attributes = &Attributes
	return params
}
func (params *CreateSupportingDocumentParams) SetFriendlyName(FriendlyName string) *CreateSupportingDocumentParams {
	params.FriendlyName = &FriendlyName
	return params
}
func (params *CreateSupportingDocumentParams) SetType(Type string) *CreateSupportingDocumentParams {
	params.Type = &Type
	return params
}
func (c *ApiService) CreateSupportingDocument(params *CreateSupportingDocumentParams) (*NumbersV2SupportingDocument, error) {
	path := "/v2/RegulatoryCompliance/SupportingDocuments"
	data := url.Values{}
	headers := make(map[string]interface{})
	if params != nil && params.Attributes != nil {
		v, err := json.Marshal(params.Attributes)
		if err != nil {
			return nil, err
		}
		data.Set("Attributes", string(v))
	}
	if params != nil && params.FriendlyName != nil {
		data.Set("FriendlyName", *params.FriendlyName)
	}
	if params != nil && params.Type != nil {
		data.Set("Type", *params.Type)
	}
	resp, err := c.requestHandler.Post(c.baseURL+path, data, headers)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	ps := &NumbersV2SupportingDocument{}
	if err := json.NewDecoder(resp.Body).Decode(ps); err != nil {
		return nil, err
	}
	return ps, err
}
func (c *ApiService) DeleteSupportingDocument(Sid string) error {
	path := "/v2/RegulatoryCompliance/SupportingDocuments/{Sid}"
	path = strings.Replace(path, "{"+"Sid"+"}", Sid, -1)
	data := url.Values{}
	headers := make(map[string]interface{})
	resp, err := c.requestHandler.Delete(c.baseURL+path, data, headers)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	return nil
}