// - Class/Member Variables -/
    // --------------------------/

    /**
     * The one-based line number. The value will be non-positive if
     * unknown.
     */
    private int lineNumber = -1;

    /**
     * The one-based column number. The value will be non-positive
     * if unknown.
     */
    private int columnNumber = -1;

    /**
     * Field source.
     */

    By having the type as `int | None`, SQLModel will know that this column should be an `INTEGER` in the SQL database and that it should be `NULLABLE`.

* `Field(index=True)` tells SQLModel that it should create a **SQL index** for this column, that would allow faster lookups in the database when reading data filtered by this column.

    SQLModel will know that something declared as `str` will be a SQL column of type `TEXT` (or `VARCHAR`, depending on the database).

	Length() (length int64, ok bool)
	DecimalSize() (precision int64, scale int64, ok bool)
	Nullable() (nullable bool, ok bool)
	Unique() (unique bool, ok bool)
	ScanType() reflect.Type
	Comment() (value string, ok bool)
	DefaultValue() (value string, ok bool)
}

type Index interface {
	Table() string
	Name() string
	Columns() []string
	PrimaryKey() (isPrimaryKey bool, ok bool)
	Unique() (unique bool, ok bool)
	Option() string

    //                                                                        ============
    protected String convertEmptyToNull(String value) {
        return (value != null && value.length() == 0) ? null : value;
    }

    // ===================================================================================

	if user1.Name != "find or init" || user1.ID != 0 || user1.Age != 33 {
		t.Errorf("user should be initialized with search value")
	}

	DB.Where(User{Name: "find or init", Age: 33}).FirstOrInit(&user2)
	if user2.Name != "find or init" || user2.ID != 0 || user2.Age != 33 {
		t.Errorf("user should be initialized with search value")
	}

	DB.FirstOrInit(&user3, map[string]interface{}{"name": "find or init 2"})

		return fmt.Errorf("%s() requires a numeric argument", fnStr)
	}
	errInvalidAggregation = errors.New("Invalid aggregation seen")
)

type aggVal struct {
	runningSum             *Value
	runningCount           int64
	runningMax, runningMin *Value

	// Stores if at least one record has been seen
	seen bool
}

func newAggVal(fn FuncName) *aggVal {
	switch fn {
	case aggFnAvg, aggFnSum:

            return holder.string;
          }
        };

    // Add the mutable cell to the builder
    builder.put(mutableCell);

    // Mutate the value
    holder.string = "bar";

    // Make sure it uses the original value.
    assertEquals(ImmutableTable.of('K', 42, "foo"), builder.build());
  }

  public void testBuilder_noDuplicates() {

	// SetBase sets the position base.
	SetBase(*src.PosBase)
	// Line reports the source line number of the token.
	Line() int
	// Col reports the source column number of the token.
	Col() int
	// Close does any teardown required.
	Close()
}

// A Token is a scan token plus its string value.
// A macro is stored as a sequence of Tokens with spaces stripped.
type Token struct {
	ScanToken
	text string
}

                        <thead><tr><td>Name</td><td>Extra column</td></tr></thead>
                        <tr><td>propName</td><td>some value</td></tr>
                    </table>
                </section>
            </chapter>
        ''')

        def extraAttribute = new ExtraAttributeDoc(parse('<td>Extra column</td>'), parse('<td>some value</td>'))
        ClassDoc classDoc = classDoc('Class', content: content)

İkinci parametre ise `dict` değerinin `value` değeri içindir:

```Python hl_lines="1  4"
{!../../docs_src/python_types/tutorial008.py!}
```

Bu şu anlama gelir:

*  `prices` değişkeni `dict` tipindedir:
    *  `dict` değişkeninin `key` değeri  `str` tipindedir (herbir item'ın "name" değeri).
    *  `dict` değişkeninin `value` değeri `float` tipindedir (lherbir item'ın "price" değeri).