diff --git a/metadata/metadata.go b/metadata/metadata.go
index 19aadb9..73dfd04 100644
--- a/metadata/metadata.go
+++ b/metadata/metadata.go
@@ -1,11 +1,5 @@
 package metadata
 
-import (
-	"fmt"
-	"strconv"
-	"time"
-)
-
 type Metadatable interface {
 	GetMetadata() Metadata
 }
@@ -15,142 +9,3 @@ type Metadata interface {
 	Set(key string, value any)
 	Get(key string) any
 }
-
-type MapMetadata map[string]any
-
-func (m MapMetadata) IsExists(key string) bool {
-	_, ok := m[key]
-	return ok
-}
-
-func (m MapMetadata) Set(key string, value any) {
-	m[key] = value
-}
-
-func (m MapMetadata) Get(key string) any {
-	if m != nil {
-		return m[key]
-	}
-	return nil
-}
-
-func (m MapMetadata) Del(key string) {
-	delete(m, key)
-}
-
-func GetBool(md Metadata, key string) (v bool) {
-	if md == nil || !md.IsExists(key) {
-		return
-	}
-	switch vv := md.Get(key).(type) {
-	case bool:
-		return vv
-	case int:
-		return vv != 0
-	case string:
-		v, _ = strconv.ParseBool(vv)
-		return
-	}
-	return
-}
-
-func GetInt(md Metadata, key string) (v int) {
-	if md == nil {
-		return
-	}
-
-	switch vv := md.Get(key).(type) {
-	case bool:
-		if vv {
-			v = 1
-		}
-	case int:
-		return vv
-	case string:
-		v, _ = strconv.Atoi(vv)
-		return
-	}
-	return
-}
-
-func GetFloat(md Metadata, key string) (v float64) {
-	if md == nil {
-		return
-	}
-
-	switch vv := md.Get(key).(type) {
-	case int:
-		return float64(vv)
-	case string:
-		v, _ = strconv.ParseFloat(vv, 64)
-		return
-	}
-	return
-}
-
-func GetDuration(md Metadata, key string) (v time.Duration) {
-	if md == nil {
-		return
-	}
-	switch vv := md.Get(key).(type) {
-	case int:
-		return time.Duration(vv) * time.Second
-	case string:
-		v, _ = time.ParseDuration(vv)
-		if v == 0 {
-			n, _ := strconv.Atoi(vv)
-			v = time.Duration(n) * time.Second
-		}
-	}
-	return
-}
-
-func GetString(md Metadata, key string) (v string) {
-	if md != nil {
-		v, _ = md.Get(key).(string)
-	}
-	return
-}
-
-func GetStrings(md Metadata, key string) (ss []string) {
-	switch v := md.Get(key).(type) {
-	case []string:
-		ss = v
-	case []any:
-		for _, vv := range v {
-			if s, ok := vv.(string); ok {
-				ss = append(ss, s)
-			}
-		}
-	}
-	return
-}
-
-func GetStringMap(md Metadata, key string) (m map[string]any) {
-	switch vv := md.Get(key).(type) {
-	case map[string]any:
-		return vv
-	case map[any]any:
-		m = make(map[string]any)
-		for k, v := range vv {
-			m[fmt.Sprintf("%v", k)] = v
-		}
-	}
-	return
-}
-
-func GetStringMapString(md Metadata, key string) (m map[string]string) {
-	switch vv := md.Get(key).(type) {
-	case map[string]any:
-		m = make(map[string]string)
-		for k, v := range vv {
-			m[k] = fmt.Sprintf("%v", v)
-		}
-	case map[any]any:
-		m = make(map[string]string)
-		for k, v := range vv {
-			m[fmt.Sprintf("%v", k)] = fmt.Sprintf("%v", v)
-		}
-	}
-	return
-}