code: def __init__(self, K):
      self.K = K
  
file_path: spektral/examples/node_prediction/citation_simple_gc.py
imports: from tensorflow.keras.callbacks import EarlyStopping
  from tensorflow.keras.layers import Input
  from tensorflow.keras.models import Model
  from tensorflow.keras.optimizers import Adam
  from tensorflow.keras.regularizers import l2
  from spektral.data.loaders import SingleLoader
  from spektral.datasets.citation import Citation
  from spektral.layers import GCNConv
  from spektral.transforms import LayerPreprocess
label_desc: Use image node_id 1 to create a new SGCN object  with example: obj = SGCN(K)