The geocoder API query is created using universal "generic" parameters
and optional api-specific "custom" parameters. Generic parameters
are converted into api parameters using the api_parameter_reference
dataset.
The query_api function executes the queries created
by this function.
get_api_query(method, generic_parameters = list(), custom_parameters = list())method name (ie. 'census')
universal 'generic' parameters
custom api-specific parameters
named list of parameters