gistfile1.md

Registration of adapter:

  <subscriber factory=".blocks.TextBlockConverter" provides="plone.restapi.interfaces.IBlockDeserializer" />

What it looks like:

@implementer(IBlockDeserializer)
@adapter(IBlocks, IBrowserRequest)
class TextBlockConverter(object):
    order = 100
    block_field_name = "text"
    
    def __call__(self):
       ""

How they are discovered:

zope.component.subscribers([self.context, self.request], IBlockDeserializer)

The alternative is to declare them the same:

@implementer(IBlockDeserializer)
@adapter(IBlocks, IBrowserRequest)
class TextBlockConverter(object):
    order = 100
    block_field_name = "text"
    
    def __call__(self):
       ""

But to register with a unique name that doesn't match anything else (or there's a ZCA conflict):

<adapter factory=".blocks.TextBlockConverter" name="something-unique" />

They would be discovered as:

for name_ignored, adapter in getAdapters((self.context, self.request), IBlockDeserializer):