973   fields: ['key', 'value']  property
977   fields: ['target', 'val']  property
980   fields: ['cond', 'body', 'else_']  property
984   fields: ['cond', 'body', 'else_']  property
987   fields: ['arr', 'name', 'body', 'else_']  property
992   fields: ['name', 'args', 'body']  property
996   fields: ['template', 'target', 'withContext']  property
1021   fields: ['name', 'args']  property
1025   fields: ['name', 'args', 'symbol']  property
1029   fields: ['name', 'body']  property
1032   fields: ['blockName', 'symbol']  property
1035   fields: ['template']  property
1039   fields: ['template', 'ignoreMissing']  property
1042   fields: ['targets', 'value']  property
1045   fields: ['expr', 'cases', 'default']  property
1048   fields: ['cond', 'body']  property
1052   fields: ['body']  property
1056   fields: ['target']  property
1059   fields: ['left', 'right']  property
1077   fields: ['expr', 'ops']  property
1080   fields: ['expr', 'type']  property
6786       fields: ['start', 'stop', 'step'],  property