code: def templateConnectionApi(connection_storage_type, ccore_flag):
      sample = read_sample(SIMPLE_SAMPLES.SAMPLE_SIMPLE1)
      network = syncnet(
          sample,
          15,
          conn_repr=connection_storage_type,
          ccore=ccore_flag,
      )
  
      for i in range(len(network)):
          neighbors = network.get_neighbors(i)
  
          assert len(sample) == len(network)
          assert len(neighbors) == len(network) - 1
          assert i not in neighbors
  
          for j in range(len(network)):
              if i != j:
                  assert network.has_connection(i, j) == True
              else:
                  assert network.has_connection(i, j) == False
  
imports: from pyclustering.cluster.syncnet import syncnet
  from pyclustering.utils import read_sample
  from pyclustering.samples.definitions import SIMPLE_SAMPLES
  from pyclustering.nnet import conn_represent
label_desc: Use image node_id 3 for calling the SyncnetTestTemplates obj's underlying member method code with example usage: obj.templateConnectionApi(connection_storage_type, ccore_flag) without return types