Is method naming "isNotNullIfMarkedAsNullable" in Illuminate/Validation/Validator readouble?

[katayamahide]

Hi, I think the method isNotNullIfMarkedAsNullable in Illuminate/Validation/Validator is not readouble.

It returns true if the data of the validating attribute is not null regardless of whether the rule should include nullable.
And it returns false if the data value is null and rules include nullable.

I could not think of a good name.
Are there any better naming or the current naming seems to be good enough?

<?php

namespace Illuminate\Validation;

class Validator implements ValidatorContract
{

    /**
     * Determine if the attribute fails the nullable check.
     *
     * @param  string  $rule
     * @param  string  $attribute
     * @return bool
     */
    protected function isNotNullIfMarkedAsNullable($rule, $attribute)
    {
        if ($this->isImplicit($rule) || ! $this->hasRule($attribute, ['Nullable'])) {
            return true;
        }

        return ! is_null(Arr::get($this->data, $attribute, 0));
    }
}