WP_Screen::get_option( string $option, string|false $key = false )

Source

File: wp-admin/includes/class-wp-screen.php

public function get_option( $option, $key = false ) {
		if ( ! isset( $this->_options[ $option ] ) ) {
			return null;
		}
		if ( $key ) {
			if ( isset( $this->_options[ $option ][ $key ] ) ) {
				return $this->_options[ $option ][ $key ];
			}
			return null;
		}
		return $this->_options[ $option ];
	}