public Builder mergeFrom(com.google.devtools.cloudtrace.v2.StackTrace.StackFrames other) {
        if (other == com.google.devtools.cloudtrace.v2.StackTrace.StackFrames.getDefaultInstance())
          return this;
        if (frameBuilder_ == null) {
          if (!other.frame_.isEmpty()) {
            if (frame_.isEmpty()) {
              frame_ = other.frame_;
              bitField0_ = (bitField0_ & ~0x00000001);
            } else {
              ensureFrameIsMutable();
              frame_.addAll(other.frame_);
            }
            onChanged();
          }
        } else {
          if (!other.frame_.isEmpty()) {
            if (frameBuilder_.isEmpty()) {
              frameBuilder_.dispose();
              frameBuilder_ = null;
              frame_ = other.frame_;
              bitField0_ = (bitField0_ & ~0x00000001);
              frameBuilder_ =
                  com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                      ? getFrameFieldBuilder()
                      : null;
            } else {
              frameBuilder_.addAllMessages(other.frame_);
            }
          }
        }
        if (other.getDroppedFramesCount() != 0) {
          setDroppedFramesCount(other.getDroppedFramesCount());
        }
        this.mergeUnknownFields(other.getUnknownFields());
        onChanged();
        return this;
      }
<pre>
A collection of stack frames, which can be truncated.
</pre>

Protobuf type {@code google.devtools.cloudtrace.v2.StackTrace.StackFrames}
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/StackTrace.java