not really https://en.wikipedia.org/wiki/Test-driven_development but somewhere around

java_console/inifile/src/main/java/com/rusefi/config/Field.java

@@ -27,6 +27,7 @@ public class Field {
     private final int bitOffset;
     private final String[] options;
     private double scale = 1;
+    private int baseOffset;
 
     public Field(String name, int offset, FieldType type) {
         this(name, offset, type, NO_BIT_OFFSET);
@@ -269,6 +270,11 @@ public class Field {
         return this;
     }
 
+    public Field setBaseOffset(int baseOffset) {
+        this.baseOffset = baseOffset;
+        return this;
+    }
+
     public double getScale() {
         return scale;
     }