Constant WRITE_FIELDS_AND_EDGES 

pub const WRITE_FIELDS_AND_EDGES: &str = "mutation($field0:UpdateProjectV2ItemFieldValueInput!,$sendField0:Boolean!,$field1:UpdateProjectV2ItemFieldValueInput!,$sendField1:Boolean!,$field2:UpdateProjectV2ItemFieldValueInput!,$sendField2:Boolean!,$field3:UpdateProjectV2ItemFieldValueInput!,$sendField3:Boolean!,$field4:UpdateProjectV2ItemFieldValueInput!,$sendField4:Boolean!,$field5:UpdateProjectV2ItemFieldValueInput!,$sendField5:Boolean!,$field6:UpdateProjectV2ItemFieldValueInput!,$sendField6:Boolean!,$field7:UpdateProjectV2ItemFieldValueInput!,$sendField7:Boolean!,$field8:UpdateProjectV2ItemFieldValueInput!,$sendField8:Boolean!,$field9:UpdateProjectV2ItemFieldValueInput!,$sendField9:Boolean!,$field10:UpdateProjectV2ItemFieldValueInput!,$sendField10:Boolean!,$field11:UpdateProjectV2ItemFieldValueInput!,$sendField11:Boolean!,$field12:UpdateProjectV2ItemFieldValueInput!,$sendField12:Boolean!,$field13:UpdateProjectV2ItemFieldValueInput!,$sendField13:Boolean!,$field14:UpdateProjectV2ItemFieldValueInput!,$sendField14:Boolean!,$field15:UpdateProjectV2ItemFieldValueInput!,$sendField15:Boolean!,$field16:UpdateProjectV2ItemFieldValueInput!,$sendField16:Boolean!,$field17:UpdateProjectV2ItemFieldValueInput!,$sendField17:Boolean!,$field18:UpdateProjectV2ItemFieldValueInput!,$sendField18:Boolean!,$block0:AddBlockedByInput!,$sendBlock0:Boolean!,$block1:AddBlockedByInput!,$sendBlock1:Boolean!,$block2:AddBlockedByInput!,$sendBlock2:Boolean!,$block3:AddBlockedByInput!,$sendBlock3:Boolean!,$block4:AddBlockedByInput!,$sendBlock4:Boolean!,$block5:AddBlockedByInput!,$sendBlock5:Boolean!,$block6:AddBlockedByInput!,$sendBlock6:Boolean!,$block7:AddBlockedByInput!,$sendBlock7:Boolean!,$block8:AddBlockedByInput!,$sendBlock8:Boolean!,$block9:AddBlockedByInput!,$sendBlock9:Boolean!,$block10:AddBlockedByInput!,$sendBlock10:Boolean!,$block11:AddBlockedByInput!,$sendBlock11:Boolean!,$block12:AddBlockedByInput!,$sendBlock12:Boolean!,$block13:AddBlockedByInput!,$sendBlock13:Boolean!,$block14:AddBlockedByInput!,$sendBlock14:Boolean!,$block15:AddBlockedByInput!,$sendBlock15:Boolean!,$block16:AddBlockedByInput!,$sendBlock16:Boolean!,$block17:AddBlockedByInput!,$sendBlock17:Boolean!,$block18:AddBlockedByInput!,$sendBlock18:Boolean!,){ field0:updateProjectV2ItemFieldValue(input:$field0) @include(if:$sendField0){projectV2Item{id}} field1:updateProjectV2ItemFieldValue(input:$field1) @include(if:$sendField1){projectV2Item{id}} field2:updateProjectV2ItemFieldValue(input:$field2) @include(if:$sendField2){projectV2Item{id}} field3:updateProjectV2ItemFieldValue(input:$field3) @include(if:$sendField3){projectV2Item{id}} field4:updateProjectV2ItemFieldValue(input:$field4) @include(if:$sendField4){projectV2Item{id}} field5:updateProjectV2ItemFieldValue(input:$field5) @include(if:$sendField5){projectV2Item{id}} field6:updateProjectV2ItemFieldValue(input:$field6) @include(if:$sendField6){projectV2Item{id}} field7:updateProjectV2ItemFieldValue(input:$field7) @include(if:$sendField7){projectV2Item{id}} field8:updateProjectV2ItemFieldValue(input:$field8) @include(if:$sendField8){projectV2Item{id}} field9:updateProjectV2ItemFieldValue(input:$field9) @include(if:$sendField9){projectV2Item{id}} field10:updateProjectV2ItemFieldValue(input:$field10) @include(if:$sendField10){projectV2Item{id}} field11:updateProjectV2ItemFieldValue(input:$field11) @include(if:$sendField11){projectV2Item{id}} field12:updateProjectV2ItemFieldValue(input:$field12) @include(if:$sendField12){projectV2Item{id}} field13:updateProjectV2ItemFieldValue(input:$field13) @include(if:$sendField13){projectV2Item{id}} field14:updateProjectV2ItemFieldValue(input:$field14) @include(if:$sendField14){projectV2Item{id}} field15:updateProjectV2ItemFieldValue(input:$field15) @include(if:$sendField15){projectV2Item{id}} field16:updateProjectV2ItemFieldValue(input:$field16) @include(if:$sendField16){projectV2Item{id}} field17:updateProjectV2ItemFieldValue(input:$field17) @include(if:$sendField17){projectV2Item{id}} field18:updateProjectV2ItemFieldValue(input:$field18) @include(if:$sendField18){projectV2Item{id}} block0:addBlockedBy(input:$block0) @include(if:$sendBlock0){issue{id} blockingIssue{id}} block1:addBlockedBy(input:$block1) @include(if:$sendBlock1){issue{id} blockingIssue{id}} block2:addBlockedBy(input:$block2) @include(if:$sendBlock2){issue{id} blockingIssue{id}} block3:addBlockedBy(input:$block3) @include(if:$sendBlock3){issue{id} blockingIssue{id}} block4:addBlockedBy(input:$block4) @include(if:$sendBlock4){issue{id} blockingIssue{id}} block5:addBlockedBy(input:$block5) @include(if:$sendBlock5){issue{id} blockingIssue{id}} block6:addBlockedBy(input:$block6) @include(if:$sendBlock6){issue{id} blockingIssue{id}} block7:addBlockedBy(input:$block7) @include(if:$sendBlock7){issue{id} blockingIssue{id}} block8:addBlockedBy(input:$block8) @include(if:$sendBlock8){issue{id} blockingIssue{id}} block9:addBlockedBy(input:$block9) @include(if:$sendBlock9){issue{id} blockingIssue{id}} block10:addBlockedBy(input:$block10) @include(if:$sendBlock10){issue{id} blockingIssue{id}} block11:addBlockedBy(input:$block11) @include(if:$sendBlock11){issue{id} blockingIssue{id}} block12:addBlockedBy(input:$block12) @include(if:$sendBlock12){issue{id} blockingIssue{id}} block13:addBlockedBy(input:$block13) @include(if:$sendBlock13){issue{id} blockingIssue{id}} block14:addBlockedBy(input:$block14) @include(if:$sendBlock14){issue{id} blockingIssue{id}} block15:addBlockedBy(input:$block15) @include(if:$sendBlock15){issue{id} blockingIssue{id}} block16:addBlockedBy(input:$block16) @include(if:$sendBlock16){issue{id} blockingIssue{id}} block17:addBlockedBy(input:$block17) @include(if:$sendBlock17){issue{id} blockingIssue{id}} block18:addBlockedBy(input:$block18) @include(if:$sendBlock18){issue{id} blockingIssue{id}}}";

A copy’s board field values and its blocked-by edges together, up to WRITE_BATCH of the two kinds between them, in one ordered request: every field value its $sendField<n> sends, then every edge its $sendBlock<n> sends. What a copy sends when one request of its writes holds both kinds; one holding a single kind is WRITE_FIELD_VALUES or ADD_BLOCKED_BYS.