code: function() {
  		var i, j, item, controls,
  		    config = this.config = this.system.config.input;
  
  		for ( i = 0; i < config.length; i++ ) {
  			item = config[ i ];
  			
  			this.setController( i, item.type );
  
  			controls = item.controls;
  			if ( !Array.isArray(controls) ) {
  				controls = [ controls ];
  			}
  
  			for ( j = 0; j < controls.length; j++ ) {
  				this.configure( i, controls[ j ].type, controls[ j ].config );
  			}
  		}
  	}
docs: Initialize total input config.