diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52567abf..3d901fa5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,11 +15,12 @@ Enhancements
 * Added `into_array` and `into_typed_array` for `Dynamic`.
 * Added `FnPtr::call` to simplify calling a function pointer.
 
-Deprecated API's
-----------------
+Deprecated and Gated API's
+--------------------------
 
 * `NativeCallContext::new` is deprecated because it is simpler to call a function pointer via `FnPtr::call`.
 * `AST::merge_filtered` and `AST::combine_filtered` are no longer exported under `no_function`.
+* `AST::new` and `AST::new_with_source` are moved under `internals`.
 
 
 Version 1.2.1
diff --git a/src/ast.rs b/src/ast.rs
index 0d50f6ec..688bb3b2 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -196,7 +196,26 @@ impl Default for AST {
 
 impl AST {
     /// Create a new [`AST`].
-    #[inline]
+    #[cfg(not(feature = "internals"))]
+    #[inline(always)]
+    #[must_use]
+    pub(crate) fn new(
+        statements: impl IntoIterator<Item = Stmt>,
+        #[cfg(not(feature = "no_function"))] functions: impl Into<Shared<Module>>,
+    ) -> Self {
+        Self {
+            source: None,
+            body: StmtBlock::new(statements, Position::NONE),
+            #[cfg(not(feature = "no_function"))]
+            functions: functions.into(),
+            #[cfg(not(feature = "no_module"))]
+            resolver: None,
+        }
+    }
+    /// _(internals)_ Create a new [`AST`].
+    /// Exported under the `internals` feature only.
+    #[cfg(feature = "internals")]
+    #[inline(always)]
     #[must_use]
     pub fn new(
         statements: impl IntoIterator<Item = Stmt>,
@@ -211,6 +230,41 @@ impl AST {
             resolver: None,
         }
     }
+    /// Create a new [`AST`] with a source name.
+    #[cfg(not(feature = "internals"))]
+    #[inline(always)]
+    #[must_use]
+    pub(crate) fn new_with_source(
+        statements: impl IntoIterator<Item = Stmt>,
+        #[cfg(not(feature = "no_function"))] functions: impl Into<Shared<Module>>,
+        source: impl Into<Identifier>,
+    ) -> Self {
+        let mut ast = Self::new(
+            statements,
+            #[cfg(not(feature = "no_function"))]
+            functions,
+        );
+        ast.set_source(source);
+        ast
+    }
+    /// _(internals)_ Create a new [`AST`] with a source name.
+    /// Exported under the `internals` feature only.
+    #[cfg(feature = "internals")]
+    #[inline(always)]
+    #[must_use]
+    pub fn new_with_source(
+        statements: impl IntoIterator<Item = Stmt>,
+        #[cfg(not(feature = "no_function"))] functions: impl Into<Shared<Module>>,
+        source: impl Into<Identifier>,
+    ) -> Self {
+        let mut ast = Self::new(
+            statements,
+            #[cfg(not(feature = "no_function"))]
+            functions,
+        );
+        ast.set_source(source);
+        ast
+    }
     /// Create an empty [`AST`].
     #[inline]
     #[must_use]
@@ -224,23 +278,6 @@ impl AST {
             resolver: None,
         }
     }
-    /// Create a new [`AST`] with a source name.
-    #[inline(always)]
-    #[must_use]
-    pub fn new_with_source(
-        statements: impl IntoIterator<Item = Stmt>,
-        #[cfg(not(feature = "no_function"))] functions: impl Into<Shared<Module>>,
-        source: impl Into<Identifier>,
-    ) -> Self {
-        Self {
-            source: Some(source.into()),
-            body: StmtBlock::new(statements, Position::NONE),
-            #[cfg(not(feature = "no_function"))]
-            functions: functions.into(),
-            #[cfg(not(feature = "no_module"))]
-            resolver: None,
-        }
-    }
     /// Get the source, if any.
     #[inline(always)]
     #[must_use]
@@ -286,7 +323,7 @@ impl AST {
         &self.body.0
     }
     /// Get a mutable reference to the statements.
-    #[cfg(not(feature = "no_optimize"))]
+    #[allow(dead_code)]
     #[inline(always)]
     #[must_use]
     pub(crate) fn statements_mut(&mut self) -> &mut StaticVec<Stmt> {
diff --git a/src/serde/metadata.rs b/src/serde/metadata.rs
index 83be1d86..ef67b4e2 100644
--- a/src/serde/metadata.rs
+++ b/src/serde/metadata.rs
@@ -272,7 +272,7 @@ impl Engine {
     }
 
     /// Generate a list of all functions in JSON format.
-    /// Available only under the `metadata` feature.
+    /// Exported under the `metadata` feature only.
     ///
     /// Functions from the following sources are included:
     /// 1) Functions registered into the global namespace