diff --git a/src/log/lvl.rs b/src/log/lvl.rs
index 2419312..1e60d5f 100644
--- a/src/log/lvl.rs
+++ b/src/log/lvl.rs
@@ -52,7 +52,7 @@ impl LogLvl {
             "fatal" | "1" => Some(LogLvl::Fatal),
             "error" | "2" => Some(LogLvl::Error),
             "warn" | "3" => Some(LogLvl::Warn),
-            "info" | "4"  => Some(LogLvl::Info),
+            "info" | "4" => Some(LogLvl::Info),
             "debug" | "5" => Some(LogLvl::Debug),
             "all" | "6" | "" | "*" => Some(LogLvl::All),
             _ => None, 
diff --git a/src/log/mod.rs b/src/log/mod.rs
index dc5a5a9..54a349b 100644
--- a/src/log/mod.rs
+++ b/src/log/mod.rs
@@ -37,7 +37,7 @@ impl Logger {
     pub fn set_info_all() {
         Self::initialized_set(true);
         Self::enable_set(true);
-        let mut logger = LOGGER.as_mut().unwrap();
+        let mut logger = LOGGER.as_mut();
         logger.mod_paths.insert("*".to_string());
         logger.max_lvl = LogLvl::Info;
     }
@@ -50,29 +50,32 @@ impl Logger {
         Self::enable_set(false);
     }
     pub fn initialized() -> bool {
-        LOGGER.get().initialized.load(Ordering::Relaxed)
+        LOGGER.as_ref().initialized.load(Ordering::Relaxed)
     }
     pub fn initialized_set(b: bool) {
-        LOGGER.get().initialized.store(b, Ordering::SeqCst);
+        LOGGER.as_ref().initialized.store(b, Ordering::SeqCst);
     }
     pub fn enable() -> bool {
-        LOGGER.get().enabled.load(Ordering::Relaxed)
+        LOGGER.as_ref().enabled.load(Ordering::Relaxed)
     }
     pub fn enable_set(b: bool) {
-        LOGGER.get().enabled.store(b, Ordering::SeqCst);
+        LOGGER.as_ref().enabled.store(b, Ordering::SeqCst);
     }
     pub fn without_cli_options() -> bool {
-        LOGGER.get().without_cli_options.load(Ordering::Relaxed)
+        LOGGER.as_ref().without_cli_options.load(Ordering::Relaxed)
     }
     pub fn without_cli_options_set(b: bool) {
-        LOGGER.get().without_cli_options.store(b, Ordering::SeqCst);
+        LOGGER
+            .as_ref()
+            .without_cli_options
+            .store(b, Ordering::SeqCst);
     }
     pub fn max_lvl() -> &'static LogLvl {
-        &LOGGER.get().max_lvl
+        &LOGGER.as_ref().max_lvl
     }
     /// `mod_path[s]`
     pub fn mps() -> Iter<'static, String> {
-        LOGGER.get().mod_paths.iter()
+        LOGGER.as_ref().mod_paths.iter()
     }
     /// The current time in the local timezone
     pub fn now() -> Tm {
@@ -131,7 +134,7 @@ impl Logger {
         // no_input    -> info/*
         // /           -> all/pkg
         // lvl/mods    -> lvl/mods
-        let mut logger = LOGGER.as_mut().unwrap();
+        let mut logger = LOGGER.as_mut();
         // avoid init second
         if logger.initialized.load(Ordering::Relaxed) {
             return;
@@ -180,7 +183,7 @@ impl Logger {
     }
     ///Log message occurs at current module and current LogLvl whether need output
     pub fn filter(mod_path: &str, lvl: LogLvl) -> bool {
-        let logger = LOGGER.get();
+        let logger = LOGGER.as_ref();
         // println!("LOGER::filter(mp: {:?},lvl: {:?}): {:?}",
         //          mod_path,
         //          lvl,
@@ -300,11 +303,11 @@ impl LogFmter {
             return;
         }
         LogFmterInitialized.store(true, Ordering::SeqCst);
-        LogFmterDefault.set(f.into()).unwrap()
+        LogFmterDefault.set(f.into())
     }
     /// Format `&LogMesg` by `LogFmter`
     pub fn call(msg: &LogMsg) -> String {
-        (LogFmterDefault.get().0)(msg)
+        (LogFmterDefault.as_ref().0)(msg)
     }
 }
 
diff --git a/src/static_mut.rs b/src/static_mut.rs
index 0e82eca..fd36e61 100644
--- a/src/static_mut.rs
+++ b/src/static_mut.rs
@@ -32,13 +32,13 @@ fn main() {
     };
     // But when write it, operate it Concurrent is unsafe.
     {
-        STRING.set(str).unwrap(); // update by setting value
-        USIZE.as_mut().unwrap().0 = 123; // update by modifying field
+        STRING.set(str); // update by setting value
+        USIZE.as_mut().0 = 123; // update by modifying field
     }
 
     // After write, You can read it Concurrent safely.
-    println!("{:?}", STRING.get());
-    println!("{:?}", USIZE.get());
+    println!("{:?}", STRING.as_ref());
+    println!("{:?}", USIZE.as_ref());
 }
 
 #[derive(Debug)]
@@ -62,30 +62,31 @@ use std::cell::UnsafeCell;
 unsafe impl<T> Sync for StaticMut<T> {}
 
 impl<T> StaticMut<T> {
+    #[inline]    
     pub fn new(value: T) -> Self {
         StaticMut(UnsafeCell::new(value))
     }
     /// read it
     #[inline]
     #[allow(unknown_lints,should_implement_trait)]
-    pub fn as_ref(&self) -> Option<&T> {
-        unsafe { self.0.get().as_ref() }
-    }
-    /// read it with `unwrap()`
-    #[inline]
-    pub fn get(&self) -> &T {
-        self.as_ref().unwrap()
+    pub fn as_ref(&self) -> &T {
+        unsafe { self.0.get().as_ref().unwrap() }
     }
     /// write it
     #[allow(unknown_lints,mut_from_ref)]
     #[inline]
-    pub fn as_mut(&self) ->Option<&mut T> {
-        unsafe { self.0.get().as_mut() }
+    pub fn as_mut(&self) -> &mut T {
+        unsafe { self.0.get().as_mut().unwrap() }
+    }
+    /// update it
+    #[inline]
+    pub fn set(&self, value:T) {
+        *self.as_mut() = value
     }
-    /// write it(returns value `is_some()` if update success)
+    ///Unwraps the value
     #[inline]
-    pub fn set(&self, value:T)-> Option<()> {
-        self.as_mut().map(|v|*v =value)
+    pub fn into_inner(self)->T {
+        unsafe {self.0.into_inner()}
     }
 }