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55.4. Nullable Options
Overview
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					In some cases, it can make sense to let method arguments default to 
null. But this is not allowed by default. If you want to allow some of your method arguments from the Java API to take null values, you must declare this explicitly using the nullableOptions element.
				Syntax
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					The 
nullableOptions element can be defined with one or more nullableOption child elements, as follows:
				<nullableOptions> <nullableOption>ArgumentName</nullableOption> ... </nullableOptions>
<nullableOptions>
  <nullableOption>ArgumentName</nullableOption>
  ...
</nullableOptions>
					Where 
ArgumentName is the name of a method argument from the Java API.
				Scope
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					As shown in the following extract, the 
nullableOptions element can optionally appear as a child of the apis element and/or as a child of api elements:
				
					You can define the 
nullableOptions element at the following scopes:
				- As a child of anapielement—thenullableOptionsmappings apply only to the API class specified by theapielement.
- As a child of theapiselement—thenullableOptionsmappings apply to all API classes by default, but can be overridden at theapilevel.
Example
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					The following example shows the nullable options declared for the 
CompaniesResource proxy class from the Apache Camel LinkedIn component: