appendHeader property
Callback that determines whether or not to append certain header.
appendHeader defaults to null, meaning all headers will be appended. Other examples:
If only header named 'foo' should be appended when tracking request:
TelemetryHttpClient(
...
appendHeader: (header) => header == 'foo',
)
If no headers should be appended when tracking request:
TelemetryHttpClient(
...
appendHeader: (_) => false,
)
Implementation
final bool Function(String header)? appendHeader;