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Quota values are limited to double-precision 64-bit IEEE 754 format in the APIs introduced in KIP-546. However, client config values are strings in a .properties file until the config values are parsed into their respective types based on the client's config definition. Dynamic client configs should also be strings so that dynamic support can be added for any type of config in the future. This also allows dynamic client configs to be parsed and validated in the same way as static client configs (.properties file). 

Hierarchy for resolving dynamic client configs

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