func (j *CDSResult) UnmarshalJSONFFLexer(fs *fflib.FFLexer, state fflib.FFParseState) error {
	var err error
	currentKey := ffjtCDSResultbase
	_ = currentKey
	tok := fflib.FFTok_init
	wantedTok := fflib.FFTok_init
mainparse:
	for {
		tok = fs.Scan()
		if tok == fflib.FFTok_error {
			goto tokerror
		}
		switch state {
		case fflib.FFParse_map_start:
			if tok != fflib.FFTok_left_bracket {
				wantedTok = fflib.FFTok_left_bracket
				goto wrongtokenerror
			}
			state = fflib.FFParse_want_key
			continue
		case fflib.FFParse_after_value:
			if tok == fflib.FFTok_comma {
				state = fflib.FFParse_want_key
			} else if tok == fflib.FFTok_right_bracket {
				goto done
			} else {
				wantedTok = fflib.FFTok_comma
				goto wrongtokenerror
			}
		case fflib.FFParse_want_key:
			if tok == fflib.FFTok_right_bracket {
				goto done
			}
			if tok != fflib.FFTok_string {
				wantedTok = fflib.FFTok_string
				goto wrongtokenerror
			}
			kn := fs.Output.Bytes()
			if len(kn) <= 0 {
				currentKey = ffjtCDSResultnosuchkey
				state = fflib.FFParse_want_colon
				goto mainparse
			} else {
				switch kn[0] {
				case 'c':
					if bytes.Equal(ffjKeyCDSResultClusters, kn) {
						currentKey = ffjtCDSResultClusters
						state = fflib.FFParse_want_colon
						goto mainparse
					}
				}
				if fflib.EqualFoldRight(ffjKeyCDSResultClusters, kn) {
					currentKey = ffjtCDSResultClusters
					state = fflib.FFParse_want_colon
					goto mainparse
				}
				currentKey = ffjtCDSResultnosuchkey
				state = fflib.FFParse_want_colon
				goto mainparse
			}
		case fflib.FFParse_want_colon:
			if tok != fflib.FFTok_colon {
				wantedTok = fflib.FFTok_colon
				goto wrongtokenerror
			}
			state = fflib.FFParse_want_value
			continue
		case fflib.FFParse_want_value:
			if tok == fflib.FFTok_left_brace || tok == fflib.FFTok_left_bracket || tok == fflib.FFTok_integer || tok == fflib.FFTok_double || tok == fflib.FFTok_string || tok == fflib.FFTok_bool || tok == fflib.FFTok_null {
				switch currentKey {
				case ffjtCDSResultClusters:
					goto handle_Clusters
				case ffjtCDSResultnosuchkey:
					err = fs.SkipField(tok)
					if err != nil {
						return fs.WrapErr(err)
					}
					state = fflib.FFParse_after_value
					goto mainparse
				}
			} else {
				goto wantedvalue
			}
		}
	}
handle_Clusters:
	{
		{
			if tok != fflib.FFTok_left_brace && tok != fflib.FFTok_null {
				return fs.WrapErr(fmt.Errorf("cannot unmarshal %s into Go value for ", tok))
			}
		}
		if tok == fflib.FFTok_null {
			j.Clusters = nil
		} else {
			j.Clusters = []*EnvoyCluster{}
			wantVal := true
			for {
				var tmpJClusters *EnvoyCluster
				tok = fs.Scan()
				if tok == fflib.FFTok_error {
					goto tokerror
				}
				if tok == fflib.FFTok_right_brace {
					break
				}
				if tok == fflib.FFTok_comma {
					if wantVal == true {
						return fs.WrapErr(fmt.Errorf("wanted value token, but got token: %v", tok))
					}
					continue
				} else {
					wantVal = true
				}
				{
					if tok == fflib.FFTok_null {
						tmpJClusters = nil
					} else {
						if tmpJClusters == nil {
							tmpJClusters = new(EnvoyCluster)
						}
						err = tmpJClusters.UnmarshalJSONFFLexer(fs, fflib.FFParse_want_key)
						if err != nil {
							return err
						}
					}
					state = fflib.FFParse_after_value
				}
				j.Clusters = append(j.Clusters, tmpJClusters)
				wantVal = false
			}
		}
	}
	state = fflib.FFParse_after_value
	goto mainparse
wantedvalue:
	return fs.WrapErr(fmt.Errorf("wanted value token, but got token: %v", tok))
wrongtokenerror:
	return fs.WrapErr(fmt.Errorf("ffjson: wanted token: %v, but got token: %v output=%s", wantedTok, tok, fs.Output.String()))
tokerror:
	if fs.BigError != nil {
		return fs.WrapErr(fs.BigError)
	}
	err = fs.Error.ToError()
	if err != nil {
		return fs.WrapErr(err)
	}
	panic("ffjson-generated: unreachable, please report bug.")
done:
	return nil
}
UnmarshalJSONFFLexer fast json unmarshall - template ffjson
package sidecarhttp
import (
	"bytes"
	"fmt"
	fflib "github.com/pquerna/ffjson/fflib/v1"
)
func (j *CDSResult) MarshalJSON() ([]byte, error) {
	var buf fflib.Buffer
	if j == nil {
		buf.WriteString("null")
		return buf.Bytes(), nil
	}
	err := j.MarshalJSONBuf(&buf)
	if err != nil {
		return nil, err
	}
	return buf.Bytes(), nil
}
func (j *CDSResult) MarshalJSONBuf(buf fflib.EncodingBuffer) error {
	if j == nil {
		buf.WriteString("null")
		return nil
	}
	var err error
	var obj []byte
	_ = obj
	_ = err
	buf.WriteString(`{"clusters":`)
	if j.Clusters != nil {
		buf.WriteString(`[`)
		for i, v := range j.Clusters {
			if i != 0 {
				buf.WriteString(`,`)
			}
			{
				if v == nil {
					buf.WriteString("null")
				} else {
					err = v.MarshalJSONBuf(buf)
					if err != nil {
						return err
					}
				}
			}
		}
		buf.WriteString(`]`)
	} else {
		buf.WriteString(`null`)
	}
	buf.WriteByte('}')
	return nil
}
const (
	ffjtCDSResultbase = iota
	ffjtCDSResultnosuchkey
	ffjtCDSResultClusters
)
var ffjKeyCDSResultClusters = []byte("clusters")
func (j *CDSResult) UnmarshalJSON(input []byte) error {
	fs := fflib.NewFFLexer(input)
	return j.UnmarshalJSONFFLexer(fs, fflib.FFParse_map_start)
}