Added lexer

src/runtime/abc/runtime_service_abc.py

@@ -0,0 +1,15 @@
+from abc import ABC, abstractmethod
+
+
+class RuntimeServiceABC(ABC):
+
+    @abstractmethod
+    def __init__(self): pass
+
+    @property
+    @abstractmethod
+    def line_count(self) -> int: pass
+
+    @line_count.setter
+    @abstractmethod
+    def line_count(self, line_count: int): pass