SimpleHeader.php

<?php

class SIMP_SimpleHeader extends ET_Builder_Module {

	public $slug       = 'simp_simple_header';
	public $vb_support = 'on';

	public function __construct() {
		$args = func_get_args(); // Because PHP won't let the method signature be different from parent class
		
		if ( $args && $args[0] ) {
			$this->fullwidth = true;
			$this->slug      = $this->slug . '_fw';
		}
		
		parent::__construct();
	}
	
	public function init() {
		$this->name = esc_html__( 'Simple Header', 'simp-simple-extension' );
	}

	public function get_fields() {
		return array();
	}

	public function render( $unprocessed_props, $content = null, $render_slug ) {

	}
}

$simp_module    = new SIMP_SimpleHeader;
$simp_module_fw = new SIMP_SimpleHeader(true);