*   New `Variable`s are not added to the same collection several times even if a
    list with duplicates is passed to the constructor.
*   The Python API will now properly set the `list` member of `AttrValue` in
    constructed `GraphDef` messages for empty lists. The serialization of some
    graphs will change, but the change is both forwards and backwards

for(const attrName in attributes){const attrArgs=attributes[attrName];const attrType=attrArgs.type;const attrValue=attrArgs.value;switch(attrType){case'scalar':{if(attrName in allocatorDump.numerics){this.model_.importWarning({type:'memory_dump_parse_error',message:'Multiple values provided for scalar attribute '+