[Feature] Add ability to specify the access modifier of the property getter and setter.

[Kiryuumaru]

Overview

I cannot use the source code generator to generate the property getter or setter access modifier. I have to do it by implementing the property manually and calling the generated SetProperty.

API breakdown

An additional parameter for the ObservablePropertyAttribute to specify the access modifier of the property getter and setter.

Usage example

[ObservableObject]
public partial class Person
{
    [ObservableProperty(Setter = AccessModifier.Private)]
    string? phoneNumber;

    public void UpdatePhoneNumber(string phoneNumber)
    {
        if (SomeUtil.CheckPhoneNumberIsValid(phoneNumber))
        {
            PhoneNumber = phoneNumber;
        }
    }
}

Will generate

public partial class Person
{
    public string? PhoneNumber
    {
        get => phoneNumber;
        private set => SetProperty(ref phoneNumber, value);
    }

    public void UpdatePhoneNumber(string? phoneNumber)
    {
        if (SomeUtil.CheckPhoneNumberIsValid(phoneNumber))
        {
            PhoneNumber = phoneNumber;
        }
    }
}

Breaking change?

No

Alternatives

I manually implement the property

[ObservableObject]
public partial class Person
{
    string? phoneNumber;
    public string? PhoneNumber
    {
        get => phoneNumber;
        private set => SetProperty(ref phoneNumber, value);
    }

    public void UpdatePhoneNumber(string? phoneNumber)
    {
        if (SomeUtil.CheckPhoneNumberIsValid(phoneNumber))
        {
            PhoneNumber = phoneNumber;
        }
    }
}

Additional context

No response

Help us help you

Yes, but only if others can assist

[Sergio0694]

Duplicate of #291.