This value should be a java.lang.Boolean, so it can implement 3VL
  (three value logic: yes, no, don't-care). The requiresOnline
  field in the mojo descriptor has the following semantics:

  [true] Online status is required for this mojo to function
         correctly.

  [false] <<(Default)>> Either status is acceptable for the mojo to
          execute. It doesn't care.

          <description>
            <![CDATA[
            When children inherit from project's url, append path or not? Note: While the type
            of this field is {@code String} for technical reasons, the semantic type is actually
            {@code Boolean}
            <p><b>Default value is</b>: {@code true}</p>
            @since Maven 3.6.1
            ]]>
          </description>
          <type>String</type>

          <defaultValue>true</defaultValue>
          <description>
            Whether this proxy configuration is the active one. Note: While the type of this field
            is {@code String} for technical reasons, the semantic type is actually {@code boolean}.
            @see #isActive()
          </description>
          <type>String</type>
        </field>
        <field>
          <name>protocol</name>