If you are looking for issues to work on, here are some issues organized by priority:

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(most of these are not simple straightforward issues; there are some nice small, but more complicated issues

Describe the bug
List#contains performs a linear search, which could have performs implications if the list is large and called repeatedly.

To Reproduce
See code

Expected behavior
A performant implementation.

Additional context
Review usage to see if a HashSet would be more appropriate in this context.

• fhir.resources version: latest
• Python version: 3.6+
• Operating System: MAC/Windows/Linux

Description

would like to add native YAML support so that a Resource object can be created from YAML object or file and serialize as a YAML string.

e.g:

>>> from fhir.resources.organization import Organization
>>> from fhir.resources.address import Address
>>> yaml_str = '''
resour