def get_gateway_counts(bpmn_graph):
return {gateway_type: get_nodes_count(bpmn_graph, node_type=gateway_type)<EOL>for gateway_type in GATEWAY_TYPES}<EOL>
Returns the count of the different types of gateways
in the BPMNDiagramGraph instance.

:param bpmn_graph: an instance of BpmnDiagramGraph representing BPMN model.
:return: count of the different types of gateways in the BPMNDiagramGraph instance