public Builder mergeFrom(com.google.cloud.tasks.v2beta3.HttpTarget.Header other) {
        if (other == com.google.cloud.tasks.v2beta3.HttpTarget.Header.getDefaultInstance())
          return this;
        if (!other.getKey().isEmpty()) {
          key_ = other.key_;
          bitField0_ |= 0x00000001;
          onChanged();
        }
        if (!other.getValue().isEmpty()) {
          value_ = other.value_;
          bitField0_ |= 0x00000002;
          onChanged();
        }
        this.mergeUnknownFields(other.getUnknownFields());
        onChanged();
        return this;
      }
<pre>
Defines a header message. A header can have a key and a value.
</pre>

Protobuf type {@code google.cloud.tasks.v2beta3.HttpTarget.Header}
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/HttpTarget.java