rename Method._is_unnamed -> is_unnamed + add docstring (#253)

Make the Method.is_unnamed a public method + give it a docstring.

src/wakepy/core/activation.py

@@ -564,7 +564,7 @@ def activate_method(method: Method) -> Tuple[MethodActivationResult, Heartbeat |
         If the `method` has method.heartbeat() implemented, and activation
         succeeds, this is a Heartbeat object. Otherwise, this is None.
     """
-    if method._is_unnamed():
+    if method.is_unnamed():
         raise ValueError("Methods without a name may not be used to activate modes!")
 
     result = MethodActivationResult(success=False, method_name=method.name)

src/wakepy/core/method.py

@@ -244,7 +244,14 @@ def __repr__(self) -> str:
         return f"<wakepy Method: {self.__class__.__name__} at {hex(id(self))}>"
 
     @classmethod
-    def _is_unnamed(cls) -> bool:
+    def is_unnamed(cls) -> bool:
+        """Tells if the Method has a name or not. See also docs for
+        `Method.name`.
+
+        Returns
+        -------
+        True if the method is without a name. Otherwise False.
+        """
         return cls.name == unnamed
 
 

src/wakepy/core/registry.py

@@ -56,7 +56,7 @@ class MethodRegistryError(RuntimeError):
 def register_method(method_class: Type[Method]) -> None:
     """Registers a subclass of Method to the method registry"""
 
-    if method_class._is_unnamed():
+    if method_class.is_unnamed():
         # Methods without a name will not be registered
         return