joern> cpg.call.id(1000119L).ddgIn.l
res85: List[nodes.TrackingPoint] = List(
  Identifier(
    id -> 1000120L,
    code -> "y",
    name -> "y",
    order -> 1,
    argumentIndex -> 1,
    typeFullName -> "int",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(7),
    columnNumber -> Some(8),
    depthFirstOrder -> None,
    internalFlags -> None
  )
)

joern> cpg.identifier.id(1000120L).ddgIn.l
res86: List[nodes.TrackingPoint] = List(
  Identifier(
    id -> 1000115L,
    code -> "y",
    name -> "y",
    order -> 1,
    argumentIndex -> 1,
    typeFullName -> "int",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(6),
    columnNumber -> Some(7),
    depthFirstOrder -> None,
    internalFlags -> None
  )
)

joern> cpg.identifier.id(1000115L).ddgIn.l
res87: List[nodes.TrackingPoint] = List(
  Call(
    id -> 1000116L,
    code -> "2 * x",
    name -> "<operator>.multiplication",
    order -> 2,
    methodInstFullName -> None,
    methodFullName -> "<operator>.multiplication",
    argumentIndex -> 2,
    dispatchType -> "STATIC_DISPATCH",
    signature -> "TODO assignment signature",
    typeFullName -> "ANY",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(6),
    columnNumber -> Some(11),
    resolved -> None,
    depthFirstOrder -> None,
    internalFlags -> None
  )
)

joern> cpg.call.id(1000116L).ddgIn.l
res88: List[nodes.TrackingPoint] = List(
  Literal(
    id -> 1000117L,
    code -> "2",
    order -> 1,
    argumentIndex -> 1,
    typeFullName -> "int",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(6),
    columnNumber -> Some(11),
    depthFirstOrder -> None,
    internalFlags -> None
  ),
  Identifier(
    id -> 1000118L,
    code -> "x",
    name -> "x",
    order -> 2,
    argumentIndex -> 2,
    typeFullName -> "int",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(6),
    columnNumber -> Some(15),
    depthFirstOrder -> None,
    internalFlags -> None
  )
)

joern> cpg.identifier.id(1000118L).ddgIn.l
res89: List[nodes.TrackingPoint] = List(
  Identifier(
    id -> 1000110L,
    code -> "x",
    name -> "x",
    order -> 1,
    argumentIndex -> 1,
    typeFullName -> "int",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(4),
    columnNumber -> Some(6),
    depthFirstOrder -> None,
    internalFlags -> None
  ),
  Literal(
    id -> 1000117L,
    code -> "2",
    order -> 1,
    argumentIndex -> 1,
    typeFullName -> "int",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(6),
    columnNumber -> Some(11),
    depthFirstOrder -> None,
    internalFlags -> None
  )
)

joern> cpg.identifier.id(1000110L).ddgIn.l
res90: List[nodes.TrackingPoint] = List(
  Identifier(
    id -> 1000106L,
    code -> "x",
    name -> "x",
    order -> 1,
    argumentIndex -> 1,
    typeFullName -> "int",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(3),
    columnNumber -> Some(6),
    depthFirstOrder -> None,
    internalFlags -> None
  ),
  Identifier(
    id -> 1000111L,
    code -> "MAX",
    name -> "MAX",
    order -> 2,
    argumentIndex -> 2,
    typeFullName -> "ANY",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(4),
    columnNumber -> Some(10),
    depthFirstOrder -> None,
    internalFlags -> None
  )
)

joern> cpg.identifier.id(1000106L).ddgIn.l
res91: List[nodes.TrackingPoint] = List(
  Call(
    id -> 1000107L,
    code -> "source()",
    name -> "source",
    order -> 2,
    methodInstFullName -> None,
    methodFullName -> "source",
    argumentIndex -> 2,
    dispatchType -> "STATIC_DISPATCH",
    signature -> "TODO assignment signature",
    typeFullName -> "ANY",
    dynamicTypeHintFullName -> List(),
    lineNumber -> Some(3),
    columnNumber -> Some(10),
    resolved -> None,
    depthFirstOrder -> None,
    internalFlags -> None
  )
)

joern> cpg.identifier.id(1000107L).ddgIn.l
res92: List[nodes.TrackingPoint] = List()