*   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.

.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:...