private void ensureEmploymentTypesIsMutable() {
      if (!((bitField0_ & 0x00001000) != 0)) {
        employmentTypes_ = new java.util.ArrayList<java.lang.Integer>(employmentTypes_);
        bitField0_ |= 0x00001000;
      }
    }
<pre>
The department or functional area within the company with the open
position.

The maximum number of allowed characters is 255.
</pre>

<code>string department = 12;</code>

@param value The bytes for department to set.
@return This builder for chaining.
java-talent/proto-google-cloud-talent-v4beta1/src/main/java/com/google/cloud/talent/v4beta1/Job.java