Mutation sample

Considering the schema sample, here is a mutation sample:

mutation { 
    CreateNodesAndRelations(
        Nodes: [
            { NodeType:"Customer", KeyProperty: "Id", KeyValue: "C1", Properties : [
                { Name : "Name", Value: "Customer1"}]},
            { NodeType:"DeliveryPoint", KeyProperty: "Key", KeyValue: "D1", Properties : [
                { Name : "Ean", Value: "ABC000"}, { Name : "IsActive", Value: 1}, { Name : "ActiveFrom", Value: "2021"}]},
            { NodeType:"Meter", KeyProperty: "Name", KeyValue: "M1", Properties : [
                { Name : "Region", Value: "BXL"}]},
        ],
         Relations: [
            {	SourceNode : {KeyProperty: "Id", KeyValue: "C1", NodeType: "Customer"},
                DestinationNodes: {NodeSelector : "Ean = 'ABC000'", NodeType: "DeliveryPoint" },
                RelationType : "HAS_ACCESS",
                Properties: [ {Name : "ContractStart", Value:"2021-01-01"}, {Name : "ContractEnd", Value:"2021-12-31"}]},
            {	SourceNode : {KeyProperty: "Key", KeyValue: "D1", NodeType: "DeliveryPoint"},
                DestinationNodes: {NodeSelector : "Name = 'M1'", NodeType: "Meter" },
                RelationType : "HAS_METER",
                Properties: [ {Name : "FromDate", Value:"1987"}]},
            {	SourceNode : {KeyProperty: "Name", KeyValue: "M1", NodeType: "Meter"},
                DestinationNodes: {NodeSelector : "PARENT(DataHubSite, Id) = 123 AND Name STARTS WITH 'Meter'", NodeType: "DataHubSource" },
                RelationType : "IS_SOURCE",
                Properties: []},				
            ]
    ){ NumberOfNodes, NumberOfRelations }
}