fix(ia): change the return type of dataset columns (#50)

Author: César Román

src/com/inductiveautomation/ignition/common/__init__.py

@@ -36,11 +36,11 @@ def getColumnIndex(self, name):
         raise NotImplementedError
 
     def getColumnName(self, col):
-        # type: (int) -> str
+        # type: (int) -> String
         raise NotImplementedError
 
     def getColumnNames(self):
-        # type: () -> List[str]
+        # type: () -> List[String]
         raise NotImplementedError
 
     def getColumnType(self, col):
@@ -107,11 +107,11 @@ def getColumnIndex(self, name):
         pass
 
     def getColumnName(self, col):
-        # type: (int) -> str
+        # type: (int) -> String
         pass
 
     def getColumnNames(self):
-        # type: () -> List[str]
+        # type: () -> List[String]
         pass
 
     def getColumnType(self, col):

src/com/inductiveautomation/ignition/common/script/builtin/__init__.py

@@ -219,11 +219,11 @@ def getColumnIndex(self, name):
             pass
 
         def getColumnName(self, col):
-            # type: (int) -> str
+            # type: (int) -> String
             pass
 
         def getColumnNames(self):
-            # type: () -> List[str]
+            # type: () -> List[String]
             pass
 
         def getColumnType(self, col):