Function isNetwork

packages/cli/src/utils/networkFamily.ts:8–10

(network: string)

const lowerCaseFirst = (str: string) => str.charAt(0).toLowerCase() + str.slice(1);

function isNetwork(network: string): network is NETWORK_FAMILY {
  return !!network && lowerCaseFirst(network) in NETWORK_FAMILY;
}

// can be either lowerCased or UpperCased
export function getNetworkFamily(network: string): NETWORK_FAMILY {