protected function is_only_sanitized( $stackPtr ) {

		// If it isn't being sanitized at all.
		if ( ! $this->is_sanitized( $stackPtr ) ) {
			return false;
		}

		// If this isn't set, we know the value must have only been casted, because
		// is_sanitized() would have returned false otherwise.
		if ( ! isset( $this->tokens[ $stackPtr ]['nested_parenthesis'] ) ) {
			return true;
		}

		// At this point we're expecting the value to have not been casted. If it
		// was, it wasn't *only* casted, because it's also in a function.
		if ( $this->is_safe_casted( $stackPtr ) ) {
			return false;
		}

		// The only parentheses should belong to the sanitizing function. If there's
		// more than one set, this isn't *only* sanitization.
		return ( \count( $this->tokens[ $stackPtr ]['nested_parenthesis'] ) === 1 );
	}