optional keyword is ignored in argument lists.

[Narendra Babu]

Hi,

Is optional keyword for method call is supported at all? The thrift
compiler is throwing below warning when optional is used for some of the
arguments of the method call.

WARNING:] optional keyword is ignored in argument lists.

Thrift version 0.9.1

Example

  i32 SampleTestMethod(

    1: optional string  desc,          <========== throws warning for this
optional
    2: i32 index,
    3: string name,
)

Thanks,
Narendra.