Request for example: Decoding of custom structure dataType values with variable length components

[hbrackel]

I kindly request an example of (client side) encoding and decoding of an extension object, containing a custom structure datatype value with potentially variable length components.

Many thanks!

Simple Example (pseudo code):

type MyCustomStructure structure {
  NodeAID *ua.NodeId
  NodeBID *ua.NodeId
  Message string
  LowerBound time.Time
  UpperBound time.Time
}
// let's assume, there is a custom OPC UA structure DataType matching MyCustomStructure definition
// the nodeId of the dataType is 
dataTypeID := NewNumericNodeId(123, 4456)

structDef := *ua.StructureDefinition...  // the structure definition of the custom dataType has already been read

// encoding
value := MyCustomStructure{ ... }
variant := ua.MustVariant(????).  // Variant to contain the binary encoded ExtensionObject of a value

// decoding
extObjWithCustomValue := .... // this is the extensionObject to be decoded; the encoding and dataType have been checked

// ???? how do I get the field values from the extension object, when field values have upfront unknown length