pub fn is_operation_preloadable(operation: &OperationDefinition) -> bool {
    operation
        .directives
        .named(*PRELOADABLE_DIRECTIVE_NAME)
        .is_some()
}
/// Check, if the operation is @preloadable.
Check, if the operation is @preloadable.
Check if the operation is @preloadable .
pub fn is_operation_preloadable(operation: &OperationDefinition) -> bool {
    operation
        .directives
        .named(*PRELOADABLE_DIRECTIVE_NAME)
        .is_some()
}
pub fn is_operation_preloadable ( operation : & OperationDefinition ) -> bool { operation . directives . named ( * PRELOADABLE_DIRECTIVE_NAME ) . is_some ( ) }
Check, if the operation is @preloadable.
Check if the operation is @preloadable .
operation
&OperationDefinition
operation
&OperationDefinition