(hidden_dim * num_heads, hidden_dim, num_heads), GATLayer(hidden_dim * num_heads, hidden_dim, num_heads) # GATConv(in_dim, hidden_dim, num_heads), # GATConv(hidden_dim * num_heads, hidden_dim, num_heads), # GATConv(hidden_dim * num_heads, hidden_dim, num_heads) ]) # ...