def bool_param(registry, xml_parent, data):
 data['default'] = str(data.get('default', False)).lower()
 base_param(registry, xml_parent, data, True, 'hudson.model.BooleanParameterDefinition')

def bool_param ( registry , xml_parent , data ) : data [ 'default' ] = str ( data . get ( 'default' , False ) ) . lower ( ) base_param ( registry , xml_parent , data , True , 'hudson.model.BooleanParameterDefinition' )
yaml: bool a boolean parameter .