diff --git a/.vscode/settings.json b/.vscode/settings.json
index ed4a07f..052fef8 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -22,5 +22,10 @@
   "reorder-python-imports.args": [
     "--application-directories=.:src",
     "--add-import 'from __future__ import annotations'",
-  ]
+  ],
+  "python.testing.pytestArgs": [
+    "tests"
+  ],
+  "python.testing.unittestEnabled": false,
+  "python.testing.pytestEnabled": true
 }
diff --git a/src/dev_toolbox/data_structures/tree.py b/src/dev_toolbox/data_structures/tree.py
index 91464a8..0b155b5 100755
--- a/src/dev_toolbox/data_structures/tree.py
+++ b/src/dev_toolbox/data_structures/tree.py
@@ -4,45 +4,52 @@
 from dataclasses import dataclass
 from dataclasses import field
 from functools import lru_cache
+from typing import Callable
 from typing import Generator
+from typing import Generic
+from typing import Hashable
+from typing import Sequence
 from typing import TYPE_CHECKING
+from typing import TypeVar
 
 
 if TYPE_CHECKING:
     from typing_extensions import Self
 
+_T = TypeVar("_T", bound=Hashable)
+
 
 @dataclass(unsafe_hash=True)
-class Node:
+class TreeNode(Generic[_T]):
     """Node for tree."""
 
-    name: str = field(hash=True)
+    data: _T = field(hash=True)
     parent: Self | None = field(default=None, hash=False)
     children: list[Self] = field(default_factory=list, hash=False)
 
     @classmethod
-    def build_tree(cls, parent_child_connections: list[tuple[str, str]]) -> list[Self]:
+    def build_tree(cls, parent_child_connections: list[tuple[_T, _T]]) -> list[Self]:
         """Build tree from connections."""
-        nodes: dict[str, Self] = {}
+        nodes: dict[_T, Self] = {}
         for parent, child in parent_child_connections:
             if parent not in nodes:
-                nodes[parent] = cls(name=parent)
+                nodes[parent] = cls(data=parent)
             if child not in nodes:
-                nodes[child] = cls(name=child)
+                nodes[child] = cls(data=child)
             nodes[parent].children.append(nodes[child])
             nodes[child].parent = nodes[parent]
 
         for node in nodes.values():
-            node.children = sorted(node.children, key=lambda x: (cls.children_count(x), x.name))
+            node.children = sorted(node.children, key=lambda x: (cls.children_count(x), x.data))
         return sorted(
             (v for v in nodes.values() if v.parent is None),
-            key=lambda x: (cls.children_count(x), x.name),
+            key=lambda x: (cls.children_count(x), x.data),
         )
 
-    def connections(self) -> Generator[tuple[str, str], None, None]:
+    def connections(self) -> Generator[tuple[_T, _T], None, None]:
         """Get connections."""
         for child in self.children:
-            yield (self.name, child.name)
+            yield (self.data, child.data)
             yield from child.connections()
 
     def nodes(self) -> Generator[Self, None, None]:
@@ -57,19 +64,35 @@ def children_count(cls, node: Self) -> int:
         """Count children."""
         return sum(1 + cls.children_count(child) for child in node.children)
 
-    def print_node(self, level: int = 0) -> None:
+    def print_node(self, level: int = 0, _repr: Callable[[_T], str] = str) -> None:
         """Print node."""
-        print("  " * level + "- " + self.name)
+        print("  " * level + "- " + _repr(self.data))
         for child in self.children:
-            child.print_node(level + 1)
+            child.print_node(level + 1, _repr=_repr)
 
-    def print_tree(self, *, prefix: str = "") -> None:
+    def print_tree(self, *, prefix: str = "", _repr: Callable[[_T], str] = str) -> None:
         if not prefix:
-            print(self.name)
+            print(_repr(self.data))
         for i, child in enumerate(self.children):
             if i == len(self.children) - 1:
-                print(f"{prefix}└── {child.name}")
-                child.print_tree(prefix=prefix + "    ")
+                print(f"{prefix}└── {_repr(child.data)}")
+                child.print_tree(prefix=prefix + "    ", _repr=_repr)
             else:
-                print(f"{prefix}├── {child.name}")
-                child.print_tree(prefix=f"{prefix}│   ")
+                print(f"{prefix}├── {_repr(child.data)}")
+                child.print_tree(prefix=f"{prefix}│   ", _repr=_repr)
+
+    @classmethod
+    def parse_indent_hierarchy(cls, lines: Sequence[str]) -> list[Self]:
+        """Parse indent hierarchy."""
+        parent_child_connections: list[tuple[str, str]] = []
+        stack: list[tuple[int, str]] = []
+        for line in lines:
+            indent = len(line) - len(line.lstrip())
+            while stack and indent <= stack[-1][0]:
+                stack.pop()
+            if stack:
+                parent = stack[-1][1]
+                child = line.strip()
+                parent_child_connections.append((parent, child))
+            stack.append((indent, line.strip()))
+        return cls.build_tree(parent_child_connections)  # type: ignore[arg-type]
diff --git a/src/dev_toolbox/reflection_tools/class_hierarchy.py b/src/dev_toolbox/reflection_tools/class_hierarchy.py
index 55c3db8..3731305 100644
--- a/src/dev_toolbox/reflection_tools/class_hierarchy.py
+++ b/src/dev_toolbox/reflection_tools/class_hierarchy.py
@@ -10,7 +10,7 @@
 from typing import Sequence
 from typing import TYPE_CHECKING
 
-from dev_toolbox.data_structures.tree import Node
+from dev_toolbox.data_structures.tree import TreeNode
 
 
 if TYPE_CHECKING:
@@ -72,8 +72,8 @@ def main(argv: Sequence[str] | None = None) -> int:
     else:
         relations = get_relations(args.files_or_modules)
 
-    tree_top_nodes = Node.build_tree(list(relations))
-    Node(name="args.root", children=tree_top_nodes).print_tree()
+    tree_top_nodes = TreeNode.build_tree(list(relations))
+    TreeNode(data="args.root", children=tree_top_nodes).print_tree()
     return 0