Fix incorrect is_declared_by func

slither/core/variables/state_variable.py

@@ -3,6 +3,13 @@ from slither.core.children.child_contract import ChildContract
 
 class StateVariable(ChildContract, Variable):
 
+    def is_declared_by(self, contract):
+        """
+        Check if the element is declared by the contract
+        :param contract:
+        :return:
+        """
+        return self.contract == contract
 
     @property
     def canonical_name(self):

slither/core/variables/variable.py

@@ -78,13 +78,6 @@ class Variable(SourceMapping):
         assert isinstance(t, (Type, list)) or t is None
         self._type = t
 
-    def is_declared_by(self, contract):
-        """
-        Check if the element is declared by the contract
-        :param contract:
-        :return:
-        """
-        return self.contract == contract
 
     def __str__(self):
         return self._name