Tags::prepare()

	protected function prepare() {
		$this->args = wp_parse_args(
			$this->args,
			array(
				'label'      => __( 'AnsPress Tags Field', 'anspress-question-answer' ),
				'array_max'  => 3,
				'array_min'  => 2,
				'terms_args' => array(
					'taxonomy'   => 'question_tag',
					'hide_empty' => false,
					'fields'     => 'id=>name',
				),
				'options'    => 'terms',
				'js_options' => array(),
			)
		);

		$js_options = array(
			'maxItems' => $this->args['array_max'],
			'form'     => $this->form_name,
			'id'       => $this->id(),
			'field'    => $this->original_name,
			'nonce'    => wp_create_nonce( 'tags_' . $this->form_name . $this->original_name ),
			'create'   => false,
			'labelAdd' => __( 'Add', 'anspress-question-answer' ),
		);

		$this->args['js_options'] = wp_parse_args( $this->args['js_options'], $js_options );

		// Call parent prepare().
		parent::prepare();

		// Make sure field is sanitized.
		$this->sanitize_cb = array_merge( array( 'array_remove_empty', 'tags_field' ), $this->sanitize_cb );
		$this->validate_cb = array_merge( array( 'is_array', 'array_max', 'array_min' ), $this->validate_cb );
	}