def construct_parameter_validators(parameter, context):
    """
    Constructs a dictionary of validator functions for the provided parameter
    definition.
    """
    validators = ValidationDict()
    if '$ref' in parameter:
        validators.add_validator(
            '$ref', ParameterReferenceValidator(parameter['$ref'], context),
        )
    for key in parameter:
        if key in validator_mapping:
            validators.add_validator(
                key,
                validator_mapping[key](context=context, **parameter),
            )
    if 'schema' in parameter:
        schema_validators = construct_schema_validators(parameter['schema'], context=context)
        for key, value in schema_validators.items():
            validators.setdefault(key, value)
    return validators
Constructs a dictionary of validator functions for the provided parameter
    definition.