*   Expose CriticalSection in core as `tf.CriticalSection`.
    *   Enhanced graphviz output.
    *   Add opkernel templates for common table operations.
    *   Fix callbacks do not log values in eager mode when a deferred build
        model is used.
    *   `SignatureDef` util functions have been deprecated.
    *   Update `Fingerprint64Map` to use aliases
    *   Add legacy string flat hash map op kernels.

-sm-9,.col-sm-auto,.col-xl,.col-xl-1,.col-xl-10,.col-xl-11,.col-xl-12,.col-xl-2,.col-xl-3,.col-xl-4,.col-xl-5,.col-xl-6,.col-xl-7,.col-xl-8,.col-xl-9,.col-xl-auto{position:relative;width:100%;padding-right:7.5px;padding-left:7.5px}.col{-ms-flex-preferred-size:0;flex-basis:0;-ms-flex-positive:1;flex-grow:1;max-width:100%}.col-auto{-ms-flex:0 0 auto;flex:0 0 auto;width:auto;max-width:100%}.col-1{-ms-flex:0 0 8.333333%;flex:0 0 8.333333%;max-width:8.333333%}.col-2{-ms-flex:0 0 16.666667%;flex:0 0 1...

.col-xl-3, .col-xl-4, .col-xl-5, .col-xl-6, .col-xl-7, .col-xl-8, .col-xl-9, .col-xl-10, .col-xl-11, .col-xl-12, .col-xl,\n.col-xl-auto {\n  position: relative;\n  width: 100%;\n  padding-right: 15px;\n  padding-left: 15px;\n}\n\n.col {\n  -ms-flex-preferred-size: 0;\n  flex-basis: 0;\n  -ms-flex-positive: 1;\n  flex-grow: 1;\n  max-width: 100%;\n}\n\n.row-cols-1 > * {\n  -ms-flex: 0 0 100%;\n  flex: 0 0 100%;\n  max-width: 100%;\n}\n\n.row-cols-2 > * {\n  -ms-flex: 0 0 50%;\n  flex: 0 0 50%;\n  max-width:...

.col-xl-3, .col-xl-4, .col-xl-5, .col-xl-6, .col-xl-7, .col-xl-8, .col-xl-9, .col-xl-10, .col-xl-11, .col-xl-12, .col-xl,\n.col-xl-auto {\n  position: relative;\n  width: 100%;\n  padding-right: 15px;\n  padding-left: 15px;\n}\n\n.col {\n  -ms-flex-preferred-size: 0;\n  flex-basis: 0;\n  -ms-flex-positive: 1;\n  flex-grow: 1;\n  max-width: 100%;\n}\n\n.row-cols-1 > * {\n  -ms-flex: 0 0 100%;\n  flex: 0 0 100%;\n  max-width: 100%;\n}\n\n.row-cols-2 > * {\n  -ms-flex: 0 0 50%;\n  flex: 0 0 50%;\n  max-width:...