diff --git a/cxxheaderparser/lexer.py b/cxxheaderparser/lexer.py
index c160eef..9650190 100644
--- a/cxxheaderparser/lexer.py
+++ b/cxxheaderparser/lexer.py
@@ -474,7 +474,7 @@ class Lexer:
         self.lookahead.extendleft(reversed(toks))
 
 
-if __name__ == "__main__":
+if __name__ == "__main__":  # pragma: no cover
     try:
         lex.runmain(lexer=Lexer(None))
     except EOFError:
diff --git a/cxxheaderparser/parser.py b/cxxheaderparser/parser.py
index d0da4db..6bd8ba5 100644
--- a/cxxheaderparser/parser.py
+++ b/cxxheaderparser/parser.py
@@ -156,21 +156,21 @@ class CxxParser:
             raise self._parse_error(tok, "' or '".join(tokenTypes))
         return tok
 
-    def _next_token_in_set(self, tokenTypes: typing.Set[str]) -> LexToken:
-        tok = self.lex.token()
-        if tok.type not in tokenTypes:
-            raise self._parse_error(tok, "' or '".join(sorted(tokenTypes)))
-        return tok
+    # def _next_token_in_set(self, tokenTypes: typing.Set[str]) -> LexToken:
+    #     tok = self.lex.token()
+    #     if tok.type not in tokenTypes:
+    #         raise self._parse_error(tok, "' or '".join(sorted(tokenTypes)))
+    #     return tok
 
-    def _consume_up_to(self, rtoks: LexTokenList, *token_types: str) -> LexTokenList:
-        # includes the last token
-        get_token = self.lex.token
-        while True:
-            tok = get_token()
-            rtoks.append(tok)
-            if tok.type in token_types:
-                break
-        return rtoks
+    # def _consume_up_to(self, rtoks: LexTokenList, *token_types: str) -> LexTokenList:
+    #     # includes the last token
+    #     get_token = self.lex.token
+    #     while True:
+    #         tok = get_token()
+    #         rtoks.append(tok)
+    #         if tok.type in token_types:
+    #             break
+    #     return rtoks
 
     def _consume_until(self, rtoks: LexTokenList, *token_types: str) -> LexTokenList:
         # does not include the found token
@@ -448,12 +448,6 @@ class CxxParser:
         else:
             self._parse_declarations(tok, doxygen)
 
-    def _parse_mutable(self, tok: LexToken, doxygen: typing.Optional[str]) -> None:
-        if not isinstance(self.state, ClassBlockState):
-            raise self._parse_error(tok)
-
-        self._parse_declarations(tok, doxygen)
-
     def _parse_typedef(self, tok: LexToken, doxygen: typing.Optional[str]) -> None:
         tok = self.lex.token()
         self._parse_declarations(tok, doxygen, is_typedef=True)
diff --git a/cxxheaderparser/parserstate.py b/cxxheaderparser/parserstate.py
index 89c892d..b68deba 100644
--- a/cxxheaderparser/parserstate.py
+++ b/cxxheaderparser/parserstate.py
@@ -1,7 +1,7 @@
 import typing
 
 if typing.TYPE_CHECKING:
-    from .visitor import CxxVisitor
+    from .visitor import CxxVisitor  # pragma: nocover
 
 from .errors import CxxParseError
 from .lexer import LexToken, Location
diff --git a/cxxheaderparser/tokfmt.py b/cxxheaderparser/tokfmt.py
index 94b241e..3fa1bf2 100644
--- a/cxxheaderparser/tokfmt.py
+++ b/cxxheaderparser/tokfmt.py
@@ -47,7 +47,7 @@ def tokfmt(toks: typing.List[Token]) -> str:
     return "".join(vals)
 
 
-if __name__ == "__main__":
+if __name__ == "__main__":  # pragma: no cover
     import argparse
 
     parser = argparse.ArgumentParser()
diff --git a/cxxheaderparser/visitor.py b/cxxheaderparser/visitor.py
index 15d2100..c6d0d81 100644
--- a/cxxheaderparser/visitor.py
+++ b/cxxheaderparser/visitor.py
@@ -4,7 +4,7 @@ import typing
 if sys.version_info >= (3, 8):
     from typing import Protocol
 else:
-    Protocol = object
+    Protocol = object  # pragma: no cover
 
 
 from .types import (
@@ -65,7 +65,9 @@ class CxxVisitor(Protocol):
         """
 
     def on_empty_block_end(self, state: EmptyBlockState) -> None:
-        ...
+        """
+        Called when an empty block ends
+        """
 
     def on_extern_block_start(self, state: ExternBlockState) -> None:
         """
@@ -78,7 +80,9 @@ class CxxVisitor(Protocol):
         """
 
     def on_extern_block_end(self, state: ExternBlockState) -> None:
-        ...
+        """
+        Called when an extern block ends
+        """
 
     def on_namespace_start(self, state: NamespaceBlockState) -> None:
         """
@@ -101,10 +105,14 @@ class CxxVisitor(Protocol):
         """
 
     def on_variable(self, state: State, v: Variable) -> None:
-        ...
+        """
+        Called when a global variable is encountered
+        """
 
     def on_function(self, state: State, fn: Function) -> None:
-        ...
+        """
+        Called when a function is encountered that isn't part of a class
+        """
 
     def on_method_impl(self, state: State, method: Method) -> None:
         """