code: protected BlockStmt fieldAssignment(String fieldName, String valueName) {
          BlockStmt body = new BlockStmt();
          body.addStatement(
                  new ExpressionStmt(new AssignExpr(new NameExpr(fieldName), new NameExpr(valueName), Operator.ASSIGN)));
          return body;
      }
docs: Generates something like <code>field = newValue</code>
  
  @param fieldName
  @param valueName
  @return