Like EnableIf/DisableIf, but:

1. When using on array/list, it works on every element of array/list rather than array/list itself
2. Only works on serialized field, not work with ShowInInspector, Button
3. Using on a single serialized field, it works just like EnableIf/DisableIf

This can be helpful if you can not enable SaintsEditor.

It also supports sub-field, and value comparison like ==, >, <=. Read more in the "Syntax for Show/Hide/Enable/Disable/Required-If" section.

// Control by field/property
public bool enable;
[FieldEnableIf(nameof(enable))] public string byField;

// Control by callback
[FieldEnableIf(nameof(ShouldEnable))] public string byCallback;
// You can omit the parameter if you do not need it
public bool ShouldEnable(string input) => input.Length < 6;

[FieldEnableIf(nameof(ShouldEnableElement))] public string[] forArray;
public bool ShouldEnableElement(string element, int index) => index % 2 == 0;