Sets the ability to pass empty-valued headers. This is valid only for headers and allows
sending a header with an empty value. Default value is false. If style is used, and if behavior
is n/a (cannot be serialized), the value of allowEmptyValue SHALL be ignored. Use of this
property is NOT RECOMMENDED, as it is likely to be removed in a later revision.
Sets the ability to pass empty-valued headers. This is valid only for headers and allows sending a header with an empty value. Default value is false. If style is used, and if behavior is n/a (cannot be serialized), the value of allowEmptyValue SHALL be ignored. Use of this property is NOT RECOMMENDED, as it is likely to be removed in a later revision.