pseudoCodeDscConfig.ps1

foreach($Node in $ConfigurationData.AllNodes) {
    # Retrieving the DSC Composite Resource name to include
    $configurations = $ConfigurationData.Roles.($Node.Role).configurations
    foreach($ConfigurationName in $configurations) {
        $ConfigurationParameters = $ConfigurationData.Roles.($Node.Role).($ConfigurationName)
        # Splat the Configuration Parameters defined in the Role to the Composite resource
        &$ConfigurationName @ConfigurationParameters
    }
}