TypeProvider class abstract

Interface providing access to Type information with optional source context.

TypeProvider abstracts the source of type information, allowing ResolvableType to work with types that come from various sources like fields, method parameters, return types, etc. This provides flexibility in how type information is obtained and allows for lazy type resolution.

Example Implementation:

class FieldTypeProvider implements TypeProvider {
  final FieldDeclaration _field;
  
  FieldTypeProvider(this._field);
  
  @override
  Type? getType() => _field.getType();
  
  @override
  Object? getSource() => _field;
}