wrong type for formState

[its-dibo]

FormlyFormOptions.formState is defined as any, means it can accept any arbitrary value.
also, the docs says

The formState property is passed to all fields and is a mechanism for communicating between fields (without having to mess with your model).
which also means it holds arbitrary value that doesn't mean anything to firmly

but when you pass formStatus.disabled=true it disables the form, which means it has been interpreted by Formly, which is not implied neither by the type definition nor the documentation.

export interface FormlyFormOptions {
    updateInitialValue?: (model?: any) => void;
    resetModel?: (model?: any) => void;
    formState?: any;
    fieldChanges?: Subject<FormlyValueChangeEvent>;
    showError?: (field: FieldType) => boolean;
    build?: (field?: FormlyFieldConfig) => FormlyFieldConfig;
    checkExpressions?: (field: FormlyFieldConfig) => void;
    detectChanges?: (field: FormlyFieldConfig) => void;
    parentForm?: FormGroupDirective | null;
}

it should be changed to

formStats: {
  disabled: boolean 
  // other props that are used by Formly
 [key:string]: any
}