diff --git a/mypy_boto3_builder/import_helpers/import_record.py b/mypy_boto3_builder/import_helpers/import_record.py
index 5fe9c5ef..e6b7e9cc 100644
--- a/mypy_boto3_builder/import_helpers/import_record.py
+++ b/mypy_boto3_builder/import_helpers/import_record.py
@@ -35,8 +35,6 @@ def __init__(
         self.alias = alias
         self.min_version = min_version
         self.fallback = fallback
-        if not self.source:
-            raise StructureError(f"ImportRecord source is empty: {self}")
 
     def render_name(self) -> str:
         """
@@ -58,10 +56,8 @@ def render(self) -> str:
             return f"from {self.source} import {self.render_name()}"
         if self.alias:
             return f"import {self.source} as {self.alias}"
-        if self.source:
-            return f"import {self.source}"
 
-        return ""
+        return f"import {self.source}"
 
     def __str__(self) -> str:
         """
@@ -73,12 +69,14 @@ def __hash__(self) -> int:
         """
         Calculate hash value based on source, name and alias.
         """
-        return (
-            hash(self.source)
-            + hash(self.name)
-            + hash(self.alias)
-            + hash(self.min_version)
-            + hash(self.fallback)
+        return hash(
+            (
+                self.source,
+                self.name,
+                self.alias,
+                self.min_version,
+                self.fallback,
+            )
         )
 
     def __eq__(self, other: object) -> bool:
diff --git a/mypy_boto3_builder/import_helpers/import_string.py b/mypy_boto3_builder/import_helpers/import_string.py
index ce25a587..8340f49a 100644
--- a/mypy_boto3_builder/import_helpers/import_string.py
+++ b/mypy_boto3_builder/import_helpers/import_string.py
@@ -47,7 +47,7 @@ def __init__(self, parent: str, *parts: str) -> None:
         has_not_empty_part = False
         for part in all_parts:
             if "." in part:
-                raise StructureError(f"ImportString parts are not slitted correctly: {all_parts}")
+                raise StructureError(f"ImportString parts are not splitted correctly: {all_parts}")
             if part:
                 has_not_empty_part = True
             elif has_not_empty_part:
@@ -64,15 +64,6 @@ def from_str(cls: type[Self], import_string: str) -> Self:
         """
         return cls(*import_string.split("."))
 
-    def __bool__(self) -> bool:
-        """
-        Whether import string is not empty.
-        """
-        if len(self.parts) > 1:
-            return True
-
-        return bool(self.parts and self.parts[0])
-
     def __str__(self) -> str:
         """
         Render as a part of a valid Python import statement.
@@ -132,7 +123,7 @@ def parent(self) -> str:
         """
         Get first import string part or `builtins`.
         """
-        return self.parts[0] if self.parts else ""
+        return self.parts[0]
 
     def is_local(self) -> bool:
         """
diff --git a/mypy_boto3_builder/structures/service_package.py b/mypy_boto3_builder/structures/service_package.py
index 1d3dbb95..d532f800 100644
--- a/mypy_boto3_builder/structures/service_package.py
+++ b/mypy_boto3_builder/structures/service_package.py
@@ -61,7 +61,7 @@ def name(self) -> str:
         """
         Package name.
         """
-        return self.data.get_service_package_name(self.service_names[0])
+        return self.data.get_service_package_name(self.service_name)
 
     @property
     def client(self) -> Client: