WebDevStudios / CMB2

		if ( null === $this->strings ) {

			$this->strings = (array) $this->args['text'];

			if ( is_callable( $this->args['text_cb'] ) ) {

				$strings = call_user_func( $this->args['text_cb'], $this );

				if ( $strings && is_array( $strings ) ) {

					$this->strings += $strings;

				}

			}

		}

		// If we have that string value, send it back.

		$this->field_options = (array) $this->args['options'];

		if ( is_callable( $this->args['options_cb'] ) ) {

			$options = call_user_func( $this->args['options_cb'], $this );

			if ( $options && is_array( $options ) ) {

				$this->field_options = $options + $this->field_options;

			}

		}

		if ( $key ) {

			return array_key_exists( $key, $this->field_options ) ? $this->field_options[ $key ] : false;