add missing docs

diff --git a/pq/Cursor/closeAsync.md b/pq/Cursor/closeAsync.md
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+++ b/pq/Cursor/closeAsync.md
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+# void pq\Cursor::closeAsync()
+
+[Asynchronously](pq/Connection/: Asynchronous Usage) close an open cursor.
+See pq\Cursor::close().
+
+## Params:
+
+None.
+
+## Throws:
+
+* pq\Exception\InvalidArgumentException
+* pq\Exception\BadMethodCallException
+* pq\Exception\RuntimeException

diff --git a/pq/Cursor/openAsync.md b/pq/Cursor/openAsync.md
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+++ b/pq/Cursor/openAsync.md
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+# void pq\Cursor::openAsync()
+
+[Asynchronously](pq/Connection/: Asynchronous Usage) reopen a cursor.
+See pq\Cursor::open().
+
+## Params:
+
+None.
+
+## Throws:
+
+* pq\Exception\InvalidArgumentException
+* pq\Exception\BadMethodCallException
+* pq\Exception\RuntimeException

diff --git a/pq/Transaction/unlinkLOB.md b/pq/Transaction/unlinkLOB.md
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+++ b/pq/Transaction/unlinkLOB.md
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+# void pq\Transaction::unlinkLOB(int $oid)
+
+Unlink a *large object*.
+See pq\Transaction::createLOB().
+
+## Params:
+
+* int $oid  
+  The OID of the *large object*.
+
+## Returns:
+
+* pq\LOB, instance of the opened *large object*.
+
+## Throws:
+
+* pq\Exception\InvalidArgumentException
+* pq\Exception\BadMethodCallException
+* pq\Exception\RuntimeException